It is said that a reliable treatment for the disease will be applied at least two or three months away and still it ______on animals.
| A．is testing | B．has tested | C．is being tested | D．has been tested |
相关试题
—Is there any flight to Tokyo today?— I think there _____, for the weather is too bad.
| A．mustn’t be | B．mightn’t be | C．needn’t be | D．can’t be |
—We need a person badly to think up such an idea.—_______ the new comer have a try?
| A．Shall | B．May | C．Should | D．Need |
Sorry I’m late. I ______ have turned off the alarm clock and gone back to sleep again.
| A．might | B．should | C．can | D．will |
I’ve tried several times, but the car just _______.
| A．doesn’t start | B．wouldn’t start | C．won’t start | D．didn’t start |
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