66.I do not wish to ______ your sincerity.
A. reflect B. reflect on C. reflect in D. reflect about
67.The smog is due ______ invisible gases， mostly from automobile exhaust.
A. from B. to C. for D. with
68.______ is accepted as true is relatively， and not absolutely， true.
A. It B. That C. What D. That it
69.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
70.Because of his degree， he refused to do ______ he thought “low” work.
A. that B. what C. which D. who
参考答案：
66.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.
67.正确答案：B答案解析：due to是固定搭配，意思是：归因于，由于。
68.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。
69.正确答案：C答案解析：keep sb doing sth：使某人持续做某事。
70.正确答案：B答案解析：what在本句中引导do的宾语从句。
