________ you ought to do now is to see a doctor at once.
| A．How | B．That | C．Which | D．What |
The letter is from my sister, ______is working in Beijing.
| A．which | B．that | C．whom | D．who |
—I‘d like a pen which _________ well.
—Will this one _________?
| A．writes； do | B．writes； work |
| C．is written； do | D．is written；work |
It was not until liberation that _________ to his hometown.
| A．did he return | B．was he returned |
| C．he did return | D．he returned |
—Why not go out for a walk before breakfast?
—Oh，yes. _________ is my favorite time of day.
| A．In the early morning | B．Early morning |
| C．The early of morning | D．The early morning that |
—I failed again. I wish I _________ harder.—But you _________.
| A．had worked； hadn’t | B．worked； don’t |
| C．had worked； didn’t | D．worked； didn’t |