【題目】Jack passed the exam though he didn’t study hard. When he showed us his report, we all looked at him ______.

【題目】After half an hour, other students began to ______ in the schoolyard.

【題目】----I wore sports shoes to the party yesterday by mistake.

【題目】If there is _____ pollution, the air in our city will be _____ dirtier.

【題目】Don’t throw away the waste paper. It needs _____ so that it can be reused.

【題目】Your pocket money must ______.

【題目】All of us find ______ necessary to take exercise every day.

【題目】He’s going to ______ a time when we can visit him.

【題目】----Is the woman ______ teacher ?

【題目】We all know _____ pollution is _____ big problem.