After leaving office in 1999, Nelson Mandela didn’t stop doing he thought was right.
| A．that | B．which | C．what | D．where |
To keep the air clean this hospital forbids all the patients ________ in and around it.
| A．smoke | B．smoking | C．to be smoking | D．smoked |
Tom looked at Jenny, with tears ________ his eyes, and shouted out the words ________ in his heart for years.
| A．filling; having been hidden | B．filled; hidden |
| C．filling; hidden | D．filled; hiding |
The shoes made in Chengdu are usually of high quality, so they ________ long.
| A．wore | B．are worn | C．wear | D．will be worn |
The number of people in the world ______ about 6 billion and large quantities of waste ________ each year.
| A．total; has been produced | B．totals; is produced |
| C．totals; are produced | D．total; are being produced |
You should have told me there was no meeting today, I ___ have run all the way here through the heavy rain.
| A．can’t | B．mustn’t | C．shouldn’t | D．needn’t |