Question

Prices____ all the time and no one knows when they         stable.

1. A.
   are going up; become
2. B.
   have been going up; will become
3. C.
   have gone up; will become
4. D.
   have been gone up; become

Answer 1

B
考察時態。根據all the time一直可知第一空應該使用現在完成進行時。第二空是賓語從句，根據句意可知是將來時。句意：物價一直都在上漲。沒有人知道什么時候會穩定下來。故B正確。