單項選擇題How to dispose （） the nuclear waste is a pressing problem for scientists and politicians alike.

A.of
B.with
C.through
D.behind


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1.單項選擇題Harry（）his pants at the seams (接縫) when he bent over.

A.sliced
B.split
C.cracked
D.broke

3.單項選擇題He went ahead（）all warnings about the danger of his mission.

A.in case of
B.in place of
C.in spite of
D.regardless of

4.單項選擇題I have made（）mistakes in my writing so that I can ask my students to find and correct them.

A.false
B.intensive
C.deliberate
D.accidental