问题描述:
单选Your electricity bill____on time,or you will be fined.
A.is due to be paid
B.is due to pay
C.due to pay
D.due to be paid
为什么不选D?
A.is due to be paid
B.is due to pay
C.due to pay
D.due to be paid
为什么不选D?
问题解答:
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