---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 |
In the dark street, there wasn’t a single person she could turn for help.
| A．who | B．whom | C．that | D．to whom |
I don’t believe his dream’s come true, it?
| A．is | B．isn’t | C．has | D．hasn’t |
Climbing Mount Tai great skills and not without risk.
| A．requires; is | B．required; was | C．required; are | D．required; were |
To our surprise, the 60-year-old granny driver eventually and drives well.
| A．became | B．has become | C．turned | D．has turned |
—Is this raincoat yours?
—No, mine _____ there behind the door.
| A．is hanging | B．has hung | C．hangs | D．is hanged |