The light is still on. He _____ to turn it off when he _____ the room.
| A．may forget: leave | B．must have forgotten : left |
| C．may forget : have left | D．could have forgotten : left |
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The book has been translated into thirty langungen tince iton the markat in 1973.
| A． | had come | B． | has come |
| C． | came | D． | comes |
To improne the pmlity of our products we uaked for nuggratior ahad used the producu.
| A． | whacver | B． | who |
| C． | whichever | D． | which |
Have you played baseball before?We need one more player.____.I like ball games ,no i believe it will be to learn baseball.
| A．Sometimes | B．Not reall |
| C．Never mind | D．That's cool |
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