相关试题
Teachers often tell their students _______ across the road when the traffic light is red.
| A．not go | B．not to go |
| C．don’t go | D．didn’t go |
–Lots of trees and flowers ________ on both sides of the road last year.
--Oh, _______ beautiful they are!
| A．have been planted; how | B．were planted; what |
| C．were planted; how | D．have been planted; what |
–Where is Tom? --He _______ the USA. He _______ back in two months.
A. has gone to; comes B. has been to; will be
C. has been to; comes D. has gone to; will be
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