They tried several times to the problem, and in the end they succeeded.
#61763
A
give up
B
work out
C
look through
D
think of
推荐题目
---May I speak to Mr. Smith? ---Sorry, he . Can I take a message?
#53437
A
sleeps
B
is sleeping
C
sleep
D
sleeping
---Lucy _________ really quiet but now she is very outgoing. ---Yes. She has changed a lot.
#57887
A
use to be
B
used to
C
used to be
D
be used to be
