In spring, we can often hear some birds_______ in our school.
#54239
A
singing
B
sing
C
to sing
D
sings
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 I have nothing to do but ________ my daughter in the evening.
#54865
A
to look after
B
looking after
C
look after
D
looked after
It was not until mid-night       they reached the camp site.
#61141
A
to stop to have
B
to stop having
C
stop to have
D
stop having