______ your hand over your mouth when you cough.
| A．Put | B．Putting |
| C．To put | D．To be putting |
-Why didn’t you go to the party ?
_______ an invitation, I would have gone to the party .
| A．Had I received | B．If I received |
| C．If I should receive | D．Were I to receive |
_______ I admit that the problems are difficult , I don’t agree that they can’t be solved .
| A．In case | B．As | C．Because | D．While |
There are fifty students in our class, ______ are girls .
| A．most of them | B．most of whom |
| C．most of who | D．most of which |
A poet and journalist ________to give us a speech tomorrow in our school .
| A．is said. | B．are said | C．is saying | D．are saying. |
I haven’t seen Tom for several months. The last time I saw him, he ______ to find a job in London..
| A．has tried | B．is trying | C．tries | D．was trying |