i'm worried about my English.()harder()you will catch up with your classmates!

问题描述:

i'm worried about my English.()harder()you will catch up with your classmates!
A.working,and
B.to work,or
C.work,and
D.worked,or

C
句型:
祈使句(动词原形开头) + and + 陈述句(常用will+ 动词原形)
此句型的祈使句表条件
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