I ______ Peter with his work, but I had a lot of things to do myself.
#86588
A
must have helped
B
should have helped
C
needn’t have helped
D
can’t have helped
推荐题目
Mother _____ us stories when we were children.
#90119
A
was used to tell
B
is used to telling
C
used to tell
D
used to telling