I don’t know who invented _____digital camera, and it’s really _____ most useful invention.
A.the; a | B.the; the | C.a; a | D.不填;不填 |
The young writer_____his success to his teacher’s encouragement.
A.paid | B.cost | C.gave | D.owed |
When you phoned me,I was having a meeting,otherwise I_______your call.
A.answered | B.would answer | C.had answered | D.would have answered |
_________I went to the US,I visited many cities.
A.First time | B.For the first time | C.The first time | D.By the first time |
He_______gardening after his retirement.
A.ended up | B.turned up | C.put up | D.took up |
Traffic on the bridge was_______for an hour because of the accident.
A.held up | B.held on | C.held back | D.kept on |