Scientists from different countries are trying to_______ a good way to solve the energy problem.
| A．keep up with | B．come up with | C．catch up with | D．meet up with |
______ he was exercising at the park yesterday morning, he found a purse under the tree.
A. While B. Before C. Though
I hear that another big library ______ in their school two years ago.
A. will be built B. is building C. was built
The singers ______ many concerts in the countryside since 2001.
A. hold B. held C. have held
—Sorry, there’s______ coffee here. How about a cup of tea?
—OK. That’s it. Thank you.
A. littleB. fewC. some
If I finish _______ the picture, I’ll go to the movies with you this afternoon.
A. paint
B. painting
C. to paint