D. 1 The children have never been to the circus 2 We have already done our room. 3 They have just begun doing their test. 4 I haven't swum in the ocean many times. 5 Nick hasn't given back my dictionary. 6 Has cousin become an engineer yet? 7 Has Mr. Watson written a new book yet?
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D.1 The children have never been to the circus
2 We have already done our room.
3 They have just begun doing their test.
4 I haven't swum in the ocean many times.
5 Nick hasn't given back my dictionary.
6 Has cousin become an engineer yet?
7 Has Mr. Watson written a new book yet?