He did well in the examination. He _____ hard at his lessons..
| A．must have worked | B．can have worked |
| C．will have worked | D．has worked |
相关试题
The latest information my belief that he is the very person that I’m looking for.
| A．confirms | B．doubts | C．shows | D．holds |
He was hit by a falling tree last night and killed ___________.
| A．on the spot | B．in a spot | C．under the spot | D．on a spot |
Hello, I _________ you _________ in London. How long have you been here?
| A．don’t know; were | B．didn’t know; were |
| C．haven’t known; are | D．hadn’t known; are |
He said it was this classroom _______ he found his lost watch and _____ he would take good of it from then on. 
| A．that; that | B．when; what | C．that; what | D．where; that |
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