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外語(yǔ)學(xué)習(xí)網(wǎng)
    70.Because of his degree， he refused to do ______ he thought “l(fā)ow” work.
    A. that B. what C. which D. who
    參考答案：
    66.正確答案：B答案解析：reflect on：思索，思考，有時(shí)表示“懷疑”。根據(jù)句意，應(yīng)該選reflect on.
    67.正確答案：B答案解析：due to是固定搭配，意思是：歸因于，由于。
    68.正確答案：C答案解析：本句中，what is accepted as true是主語(yǔ)從句，在句子中作主語(yǔ)。
    69.正確答案：C答案解析：keep sb doing sth：使某人持續(xù)做某事。
    70.正確答案：B答案解析：what在本句中引導(dǎo)do的賓語(yǔ)從句。