— Would you like to play games with me? —Sorry. My mother is ill in bed. I have to ____ her.
A. look after
B. take after
C. look for
Helen________her keys in the office so she had to wait until her husband________home．
| A．has left；comes |
| B．left；had come |
| C．had left；came |
| D．had left；would come |
The pen I________I________is on my desk．
| A．think；lost |
| B．thought；had lost |
| C．think；had lost |
| D．thought；have lost |
________got into the room________the telephone rang．
| A．He hardly had；then |
| B．Hardly had he；when |
| C．He had not；that |
| D．Not had he；when |
Tom was disappointed because most of the guests________when he________at the party．
| A．left；had arrived |
| B．left；arrived |
| C．had left；had arrived |
| D．had left；arrived |
—Why did you miss the English class?
—Because my alarm clock didn’t________．
| A．go off |
| B．put off |
| C．take off |
| D．fall off |