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问题

They have been skating ______. [ ]

A: for three hours ago
B: since three hours ago
C: three hours ago
D:since three hours
正确答案是:
标签: hours , since , three
同类题型

He ought ot have been warned of the danger.——____, but he wouldn’t listen to me.

We would like to _______ some money _______ the poor children in our country.

Excuse me. Could you tell me _________? -Sure. I bought them in a video shop on River Road.

You are great! Congratulations on winning the first prize! —Thank you! Mr. Yu You__________ me to practice again and again every day.

Here is the knife. You can ask your mother ___the apple for you.

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