–Is he coming?
--I’m not sure. He may be late or, ________, he may not come at all.
| A．at present | B．at least | C．worse still | D．for a while |
We should consider what use can we make ______ such material.
| A．of | B．from | C．up | D．in |
He commanded the students ______ the classroom before he returned.
| A．did not leave | B．leave not | C．not to leave | D．not leaving |
–How about _______ Christmas evening party?
_ I should say it was _______ success.
| A．a; a | B．a; \ | C．the; a | D．the; \ |
No sooner _______ the competition _______ _______ an unexpected accident happened.
| A．did … begin; than | B．had … begun; when |
| C．did … begin; when | D．had … begun; than |
Not until he took off his sunglasses _______ him.
| A．I recognized | B．I did recognize | C．did I recognize | D．do I recognize |