The determined mother has devoted all she has to ________ her son out of trouble.
#95959
A
helping
B
help
C
have helped
D
having helped
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It’s time he _________ piano. Don’t you think he has wasted too much time online? 
#96148
A
stopped to take up
B
stops taking up
C
stopped to leave alone
D
stops leaving alone
The mother didn't know who ________ for the broken glass as it happened.
#91561
A
to blame
B
to be blamed
C
blamed
D
is to be blamed