. Dr. Smith, together with his wife, ______ visit Beijing this summer.
| A．is going to | B．are going to | C．was going to | D．were going to |
It is said that this is the biggest lab ________ they have ever built in their school.
| A．which | B．what | C．不填 | D．where |
In order to attract more customers, many supermarkets usually sell their goods at a good________ at weekends.
| A．benefit | B．discount | C．interest | D．cost |
It will be at least three weeks________ he recovers from his illness and returns to work.
| A．before | B．when | C．since | D．after |
He found his house broken into and many things stolen _______ his return from office.
| A．with | B．in | C．at | D．on |
Making good friends is no ________ important to us than choosing a good job; we should take both of them seriously.
| A．more | B．less | C．most | D．least |