I________that all windows are shut.I did it.
| A．make sure | B．am sure | C．make clear | D．am clear |
相关试题
Every possible means ________ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used | C．has been used | D．have been used |
He felt ______ as soon as he realized that he had asked a foolish question.
| A．bored | B．displeased | C．embarrassed | D．disappointed |
All the neighbors admire this family _______ the parents are treating their child like a friend.
| A．why | B．where | C．which | D．that |
Lucy had an unusual ______ for learning languages when she was a baby.
| A．quality | B．gift | C．purpose | D．sense |
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