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 |
In our school library there ____ a number of books on science and the number of them ____ growing larger and larger.
| A．is; are | B．are; is | C．is; is | D．are; are |
It’s said that Armstrong sent a message to Mission Control _____ said that two huge, strange objects landed near them and were watching them.
| A．who | B．which | C．whom | D．whose |
— It is so hot in the classroom. Would you mind ____ the windows?
—OK. I’ll do it right now.
| A．not closing | B．not opening | C．opening | D．closing |
—Look, what have you done?
—Sorry. I think if I _____ another chance, I’ll do it better.
| A．give | B．will be given | C．will give | D．am given |
—When shall we meet again?
—Make it _____ day you like. It’s all the same to me.
| A．one | B．any | C．another | D．all |