Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute. 
#105067
A
is
B
was
C
has been
D
had been
推荐题目
I found a bucket, ______ it in the sink and turned the tap on. 
#105218
A
put
B
putting
C
to put
D
having put
The prisoners _____ to escape, but failed.
#105219
A
succeeded
B
attempted
C
managed
D
advised
They were surrounded by the enemy, but finally they _____ out of the encirclement.
#105227
A
managed breaking
B
tried breaking
C
managed to break
D
tried to