When H7N9 bird flu first appeared,people didn’t know _____ doctors could cure it.
| A．if | B．that | C．What | D．Why |
—Why are you looking for Mary in a hurry, John?
—The boss is wondering where she _______ and how long she _______ there.
| A．has been; has been | B．has gone; has gone |
| C．has been; has gone | D．has gone; has been |
It _______ over ten days since the dog _______.
| A．is; has been dead | B．has been; died |
| C．has been; has been dead | D．was; has died |
The husband and wife have strange habits. He’d like to sleep with lamp _______ at night and his wife likes to sleep with the window _______.
| A．burning; wide open | B．burnt; widely opened |
| C．burnt; wide open | D．burning; widely open |
From March 23rd, 2013, anyone under the age of 14 __________ go into Disney’s parks alone.
| A．couldn’t | B．mustn’t |
| C．needn’t | D．mightn’t |
The fish ______________for some time. You’d better cook them at once.
| A．has died | B．has been dead |
| C．have died | D．have been dead |