She looks very busy . I want to help her , but I don't know ___________ .
#50250
A
what to do
B
what to do it
C
how to do
D
why to do
推荐题目
We are looking forward ____________ a film next week.
#49721
A
to see
B
to seeing
C
for seeing
D
seeing
–We should do what we can _____ the endangered animals.` --Yes, it’s duty_____ them.
#50588
A
save, to protect
B
save, protect
C
to save, protect
D
to save, to protect
Fruit and vegetables are good for us. We need them __________ healthy.
#48814
A
keep
B
keeping
C
to keep
D
keeps