He gave me some very _____ advice on buying a house.
| A．precious | B．worthy | C．precise | D．valuable |
There aren’t many seats left for the concert; you had better make sure ____ two today.
| A．getting | B．to have got | C．that you get | D．that you will get |
Examination compositions, together with most business letters and government reports, are the main situations ____ formal language is used.
| A．in which | B．on which | C．of which | D．for which |
If you don’t keep the meat in the refrigerator on such a hot day, it may ____.
| A．go out | B．go away | C．go off | D．go down |
——The book isn’t easy for Jack to understand, is it?
——____. His foreign language is far better than expected.
| A．No, it isn’t | B．I’m afraid not | C．I don’t think so | D．Yes, it is |
Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes to classroom tests.
| A．before | B．since | C．when | D．after |