问题

lked down the hills, _______ softlyto himself.

A:sing
B:singing
C:sung
D:to sing

正确答案是：

同类题型

The most exciting thing for him was____he finally succeeded in____seemed to be the most difficult exam to him.

The rest of the apple _________

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─ Is __________ the capital of Canada─ Yes, it is.

I’m sorry I always my book at home.–Please it to school next time.