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1.I do not wish to ______ your sincerity.
A.reflect B.reflect on C.reflect in D.reflect about
2.The smog is due ______ invisible gases，mostly from automobile exhaust.
A.from B.to C.for D.with
3.______ is accepted as true is relatively，and not absolutely，true.
A.It B.That C.What D.That it
4.How can you keep the machine ______ when you‘re away?
A.run B.to run C.running D.being run外语学习网
5.Because of his degree，he refused to do ______ he thought“low”work.
A.that B.what C.which D.who
1.正确答案：B答案解析：reflect on：思索，思考，有时表示“怀疑”。根据句意，应该选reflect on.
2.正确答案：B答案解析：due to是固定搭配，意思是：归因于，由于。
3.正确答案：C答案解析：本句中，what is accepted as true是主语从句，在句子中作主语。
4.正确答案：C答案解析：keep sb doing sth：使某人持续做某事。
5.正确答案：B答案解析：what在本句中引导do的宾语从句。