---高频词组----
fill in
fill out ( =fill in )
set the world on fire=set the flames on fire (=do sth. remarkable)
play with fire (=take great risks)
set sth. on fire (=set fire to sth.)
at first sight (=when first seen)
for the first time
in the first place
fit into
fit in with ( = suit , fall into agreement)
(be) fit for (=right and suitable for)
focus on (=concentrate on)
focus sth. on
请大家写下中文解释^_^