---I have looked for my keys everywhere, but I can’t find them.
---Sorry to hear that. You _____ them somewhere.
| A．must lose | B．should lose |
| C．must have lost | D．should have lost |
________they were often separated due to work, they have understood and supported each other and continuously shown concern for each other.
| A．When | B．Although | C．As | D．Because |
Everything seems to be going______for the first two weeks after I moved to Shanghai.
| A．smoothly | B．vividly |
| C．frequently | D．generally |
The hunter shot at the birds ______ the big tree, only to shoot ______．
| A．on; nothing | B．on; neither | C．in; none | D．in; no one |
—How long did David work here?
—For half a year, he didn't leave much_______on us.
| A．expression | B．instruction |
| C．conclusion | D．impression |
_____ in a poor family made Tom very dilligent when he was still young.
| A．Brought up | B．Bringing up | C．Having brought up | D．Being brought up |