He suggested that we should _______ the instruction.
| A．simple | B．simplify | C．simply | D．simplified |
You must watch carefully everything _____ the teacher does in class.
| A．where | B． who |
| C．what | D．that |
She didn't come to his birthday party just_____ what he had said to her the day before.
| A．because | B．because of |
| C．as a result | D．thanks for |
Drivers are warned that it is dangerous to talk on the phone while________.
| A．drive | B．driving |
| C．drove | D．to drive |
The Great Wall is _________________ tourist attraction that millions of people pour in every year.
| A．so a well-known | B．a such well-known |
| C．so well-known | D．such a well-known |
They began to consider what use could ___ the natural resources（资源）.
| A．be made from | B．be made of |
| C．be made up of | D．be made into |