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單項選擇題

When he suddenly（） up the subject of genetic engineering, there was an embarrassed silence.

A.took
B.brought
C.showed
D.came

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單項選擇題

The problem（）when the students refused to do their homework.

A.arose
B.aroused
C.rose
D.raised

單項選擇題

Speaker A: Want to come over Thursday for supper? Speaker B:（）

A.I really can't. You'll not mind, I think
B.Let's put it off till later
C.Thanks, but I have to work that evening
D.No, I don't want to