BT: Rewrite the following sentences. (Chuyển câu bị động và chủ động)
1)People don't learn a foreign language in a short time.
2)Did anyone ask any questions about me?
3) Henry wrote that book years ago, didn't he?
4) I wasn't introduced to any of the guests.
5) What sort of research are they doing in the laboratory
6) You should place matches out of reach of children
7) We will finish all the work this weekend
8) Nothing can be gained without the effort
9) Where did your child find the keys?
10) They will sign these documents.
11) The workers are pulling down that old building
12) No one told me the truth
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