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Sometimes I doubt whether it is worth_______so_________.
#48751
A
to work;hard
B
to work;hardly
C
working;hard
D
working;hardly
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He thinks _____ history about Chinese is very important.
#49013
A
studied
B
studying
C
studies
D
study
They decided              to the mountain.
#49735
A
hiking
B
on hike
C
to hike
D
not hiking
Our music teacher is always heard _______ in the music room.
#50599
A
sing
B
sang
C
singing
D
to sing
Students should do everything they can __their study.
#50600
A
improve
B
to improve
C
improving
D
improved
My sister spends as much time as she can_______.
#48623
A
practicing to dance
B
practice to dance
C
practice dancing
D
practicing dancing