问题

Yesterday, when I went past the classroom, I _ someone _.

A:hear, singing
B:heard, singing
C:heard, sang
D:hear, sang

正确答案是：

标签： hear , heard , yesterday

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It took her______ to cook the delicious food.

I have trouble dealing with the problems, but I will never.

_____ might be expected, the response to the question was very mixed.

Can you tell me ___________________? You look upset.