10 - Visual art and architecture
20 - Strategies for basic comprehension

10 - Unit 1 Episode 1
20 - Unit 1 Episode 2
30 - Unit 1 Episode 3
40 - Unit 1 Episode 4
50 - Unit 1 Episode 5
60 - Unit 1 Episode 6
70 - Unit 2 Episode 1
80 - Unit 2 Episode 2
90 - Unit 2 Episode 3
100 - Unit 2 Episode 4
110 - Unit 2 Episode 5
120 - Unit 2 Episode 6
130 - Unit 3 Episode 1
140 - Unit 3 Episode 2
150 - Unit 3 Episode 3
160 - Unit 3 Episode 4
170 - Unit 3 Episode 5
180 - Unit 3 Episode 6
190 - Unit 4 Episode 1
200 - Unit 4 Episode 2
210 - Unit 4 Episode 3
220 - Unit 4 Episode 4
230 - Unit 4 Episode 5
240 - Unit 4 Episode 6
250 - Unit 5 Episode 1
260 - Unit 5 Episode 2
270 - Unit 5 Episode 3
280 - Unit 5 Episode 4
290 - Unit 5 Episode 5
300 - Unit 5 Episode 6
310 - Unit 6 Episode 1
320 - Unit 6 Episode 2
330 - Unit 6 Episode 3
340 - Unit 6 Episode 4
350 - Unit 6 Episode 5
360 - Unit 6 Episode 6
370 - Unit 7 Episode 1
380 - Unit 7 Episode 2
390 - Unit 7 Episode 3
400 - Unit 7 Episode 4
410 - Unit 7 Episode 5
420 - Unit 7 Episode 6
430 - Unit 8 Episode 1
440 - Unit 8 Episode 2
450 - Unit 8 Episode 3
460 - Unit 8 Episode 4
470 - Unit 8 Episode 5
480 - Unit 8 Episode 6
490 - Unit 9 Episode 1
500 - Unit 9 Episode 2
510 - Unit 9 Episode 3
520 - Unit 9 Episode 4
530 - Unit 9 Episode 5
540 - Unit 9 Episode 6
550 - Unit 10 Episode 1
560 - Unit 10 Episode 2
570 - Unit 10 Episode 3
580 - Unit 10 Episode 4
590 - Unit 10 Episode 5
600 - Unit 10 Episode 6
610 - UNLOCK-A2期末测试

20 - Unit 1 Episode 1
30 - Unit 1 Episode 2
40 - Unit 1 Episode 3
50 - Unit 1 Episode 4
60 - Unit 1 Episode 5
70 - Unit 1 Episode 6
80 - Unit 1 Episode 7
90 - Unit 1 Episode 8
100 - Unit 2 Episode 1
110 - Unit 2 Episode 2
120 - Unit 2 Episode 3
130 - Unit 2 Episode 4
140 - Unit 2 Episode 5
150 - Unit 2 Episode 6
160 - Unit 2 Episode 7
170 - Unit 2 Episode 8
180 - Unit 3 Episode 1
190 - Unit 3 Episode 2
200 - Unit 3 Episode 3
210 - Unit 3 Episode 4
220 - Unit 3 Episode 5
230 - Unit 3 Episode 6
240 - Unit 3 Episode 7
250 - Unit 3 Episode 8
260 - Unit 4 Episode 1
270 - Unit 4 Episode 2
280 - Unit 4 Episode 3
290 - Unit 4 Episode 4
300 - Unit 4 Episode 5
310 - Unit 4 Episode 6
320 - Unit 4 Episode 7
330 - Unit 4 Episode 8
340 - Unit 5 Episode 1
350 - Unit 5 Episode 2
360 - Unit 5 Episode 3
370 - Unit 5 Episode 4
380 - Unit 5 Episode 5
390 - Unit 5 Episode 6
400 - Unit 5 Episode 7
410 - Unit 5 Episode 8
420 - Unit 6 Episode 1
430 - Unit 6 Episode 2
440 - Unit 6 Episode 3
450 - Unit 6 Episode 4
460 - Unit 6 Episode 5
470 - Unit 6 Episode 6
480 - Unit 6 Episode 7
490 - Unit 6 Episode 8
500 - Unit 7 Episode 1
510 - Unit 7 Episode 2
520 - Unit 7 Episode 3
530 - Unit 7 Episode 4
540 - Unit 7 Episode 5
550 - Unit 7 Episode 6
560 - Unit 7 Episode 7
570 - Unit 7 Episode 8
580 - Unit 8 Episode 1
590 - Unit 8 Episode 2
600 - Unit 8 Episode 3
610 - Unit 8 Episode 4
620 - Unit 8 Episode 5
630 - Unit 8 Episode 6
640 - Unit 8 Episode 7
650 - Unit 8 Episode 8
660 - Unit 9 Episode 1
670 - Unit 9 Episode 2
680 - Unit 9 Episode 3
690 - Unit 9 Episode 4
700 - Unit 9 Episode 5
710 - Unit 9 Episode 6
720 - Unit 9 Episode 7
730 - Unit 9 Episode 8
740 - Unit 10 Episode 1
750 - Unit 10 Episode 2
760 - Unit 10 Episode 3
770 - Unit 10 Episode 4
780 - Unit 10 Episode 5
790 - Unit 10 Episode 6
800 - Unit 10 Episode 7
810 - Unit 10 Episode 8
820 - UNLOCK B1 期末测试

30 - Visual art and architecture
40 - Literature
50 - Music and dance
60 - Weely workshop-1
70 - Biology
80 - Medicine and healthcare
90 - Animal behavior
100 - Weely workshop-2
110 - History
120 - Business and economics
130 - Sociology and archeology
140 - Weely workshop-3
150 - Technology and computers
160 - Climate and environment
170 - Chemistry, physics, astronomy
180 - Weely workshop-4
190 - Geology
200 - Psychology
210 - College campus vocabulary
220 - Weekly Workshop Study week

40 - Review of verb forms
50 - Review of articles
60 - Subject-verb agreement
70 - Comparative structures
80 - Modals
90 - Conditional sentences
100 - Problems and solutions
110 - Reported speech (1)
120 - Reported speech (2)
130 - Gerunds and infinitives
140 - Reference words
150 - The passive
160 - Conjunctions
170 - Relative clauses
180 - Office hours conversations
190 - Causatives
200 - Introductory there and it
210 - Paraphrasing
220 - Nominalization
230 - Common errors