The number of people who speak English ______ large, and a large number of people _______ native speakers.
| A．are ; are | B．is ; are | C．is ;is | D．are ;is |
—At last I’ve made it.I am on top of the world.
—______
| A．Congratulations! | B．You are really clever! |
| C．Oh,really? | D．Congratulate! |
We congratulated him ______ his getting a gold medal.That is to say: we offered him our congratulations ______ his getting a gold medal.
| A．at;on | B．of;on | C．on;for | D．on;on |
You have made a few mistakes in your composition but ______ you have done well.
| A．as a whole | B．on the whole |
| C．on the other hand | D．generally speaking |
In the experiment you should keep a watchful eye ______ the developments and record every detail.
| A．in | B．at | C．for | D．on |
He said ______ couldn’t he work out the problem but his teacher didn’t know how to do it.
| A．though | B．never | C．hardly | D．not only |