I cannot hear the professor clearly as there is too much noise _____ I am sitting.
| A．that | B．where | C．who | D．what |
---You may find the key to the maths problem on page 107.
---Ah, it’s so simple. I wonder why I ________ of that.
| A．didn’t think | B．haven’t thought | C．wasn’t thinking | D．hadn’t thought |
----You seem to have known Dr Smith for a long time.
---- That’s true. ______ he joined our club six years ago.
| A．Since | B．Until | C．When | D．Before |
----I don’t mind telling you what I know.
----You ________. I’m not asking you for it.
| A．mustn’t | B．needn’t | C．may not | D．shouldn’t |
The Mid-Autumn Day, which is a day for family reunion in China, _____ on September 12th this year.
| A．falls | B．fixes | C．lies | D．sets |
Three years ago in Beijing, my best friend, David, was hit by a car while riding a bike, _______ a terrible brain injury.
| A．caused | B．to cause | C．causing | D．being caused |