—This returned scholar has become one of the top experts in this field. —Yes, I know him very well. He ______ for ten years at an institute in the USA.A. has worked B. has been working C. worked D. had worked
We give dogs time, space and love we can spare, and ____________, dogs give us their all.
Barbara has worked here for three years, so I’m sure she’s quite ______ to the task.
—Do you think it’s a good idea to make friends with your students ? — ___________, I do. I think it’s a great idea.
This amber necklace is a real _______ at such a low price.
It’s reported that many policemen were sent to the forest ____________ the missing boy.