6.I do not wish to ______ your sincerity.
A. reflect
B. reflect on
C. reflect in
D. reflect about
7.The smog is due ______ invisible gases， mostly from automobile exhaust.
A. from
B. to
C. for
D. with
8.______ is accepted as true is relatively， and not absolutely， true.
A. It
B. That
C. What
D. That it
9.How can you keep the machine ______ when you‘re away?
A. run
B. to run
C. running
D. being run
10.Because of his degree， he refused to do ______ he thought “low” work.
A. that
B. what
C. which
D. who
