Come and see me whenever ________ .
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |
His father ________ a letter from him since he left without a word .
| A．hasn’t received | B．didn’t get |
| C．didn’t have | D．haven’t heard |
I was just about to leave ______the telephone rang.
| A．while | B．as | C．before | D．when |
— Why don’t you go into the office ,John
—I have ______ my office keys at home.
| A．forgot | B．kept | C．leaving | D．left |
The reason ______she didn’t come to school was_____
she had to look after her sick mother.
| A．because ; why | B．that ; because |
| C．why ; that | D．which ;that |
I smell something ______ in the kitchen. Can I call you back in a minute ?
| A．burning | B．burnt | C．being burnt | D．to be burnt |