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
–– When did they arrive?–– They ______two hours ago .They ______ here for two hours .
#58577
A
arrived; have arrived
B
arrived; have been
C
got; have been
D
reached; have reached
He _________ for two years. We are still sad about his _________.
#55114
A
died, dead
B
died , death
C
has been dead , dead
D
has been dead, death
I used to be afraid to speak in front of public before, but recently I _____ a lot.
#52312
A
have improved
B
improved
C
will improve
D
am improving