Generally speaking , ______according to the directions , the drug has no side effect .
| A．when taking | B．when taken | C．when to take | D．when to be taken |
An unexpected heavy rain caused severe flooding, and the water _____ all the time.
| A．rose | B．raised | C．was rising | D．was raising |
_____ a noise just then?
| A．Have you heard | B．Were you hearing |
| C．Are you hearing | D．Did you hear |
Great changes _____ in the last twenty years in China.
| A．took place | B．have taken place |
| C．were taking place | D．have been taken place |
— Where _____?
— I got stuck in the heavy traffic. I _____ here earlier.
| A．did you go； had arrived | B．have you been； would have been |
| C．were you； would come | D．are you； was |
— You haven’t said a word about my new coat, Brenda. Do you like it?
— I’ m sorry I _____ anything about it sooner. I certainly think it’s pretty on you.
| A．wasn’t saying | B．don’t say | C．won’t say | D．didn’t say |