The old couple have married for 40 years and never once _______ with each other.
| A．they had quarreled |
| B．they have quarreled |
| C．have they quarreled |
| D．had they quarreled |
By the time Mary gets home, her aunt ____ for London to attend a meeting.
| A．will leave | B．will have left | C．leaves | D．left |
Hardly ______________ when it began to rain.
| A．had the game begun | B．began the game |
| C．the game had begun | D．did the game begin |
________ for the free tickets, I would not have gone to the films so often.
| A．If it is not | B．Were it not | C．Had it not been | D．If they were not |
The Governor demanded that all the proposals _______ on May 1st.
| A．must be submitted | B．be submitted | C．submitted | D．were submitted |
—Do you know what _____ influenza A (H1N1) has?
—A high temperature, throat pain and so on.
| A．signals | B．roots | C．symptoms | D．treatments |