A.take part | B.play a part in | C.participate in | D.participate |
A.are sitting | B.sit | C.sat | D.have sat |
A.came up | B.called up | C.took up | D.made up |
A.come | B.has come | C.should come | D.came |
A.forget | B.forgot | C.have forgotten | D.had forgotten |
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