—Your mother isn’t a doctor, is she?
----___________. She teaches English in a middle school.
| A．Yes, she is | B．Yes, she isn’t | C．No, she isn’t | D．No, she is |
—We are going to be late, Mary. Do you have the time?
—________.
| A．Yes，I do. | B．Don't worry. |
| C．Five to eight. | D．No, I'm busy. |
Everybody knows about it now! But no one knows ________ once prevented the rumor from spreading.
| A．what was it that | B．what it was that |
| C．how it was that | D．why it was that |
Programs，________to join the old and the young together, are growing in popularity all over the world.
| A．designed | B．to be designed |
| C．designing | D．having designed |
________， the pay isn't attractive enough, though the job itself is quite interesting.
| A．Generally speaking | B．On the contrary |
| C．In particular | D．To be honest |
Hardly ________ twelve when they realized that it was too late to catch the last train.
| A．the clock had struck |
| B．the clock had been struck |
| C．had the clock been struck |
| D．had the clock struck |