We've had a good start, but next, more work needs    ________  to achieve the final success in English study.
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A
being done
B
do
C
to be done
D
to do
推荐题目
       in faraway northwest, this place has its beautiful fresh air.
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A
Being located
B
Located
C
locating
D
To be located
The teacher just took down the names of the students _______ during the exam.
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A
caught cheating
B
caught to cheat
C
catching cheating
D
to catch cheating
Tom has been out of work for two years, so he has difficulty______. 
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A
earning living
B
earning his living
C
to earn livings
D
to earn his living