8.The teacher told us nothing __ difficult if we put our hearts into it.
A.is
B.was
C.will be
D.were
9.Whether or not the next plan will yield any positive results __ to be seen.
A.remain
B.remains
C.is remained
D.have remained
10.She could not have believed it, but that she___ it.
A.had seen
B.see
C.saw
D.would see
11.A dark suit is preferable __ a light one for evening wear.
A.to
B.than
C.for
D.against
12.He knows little of physics, and __ of math.
A.even more
B.still less
C.no less
D.still more
13.Which of the following adverbs can NOT be used to complete "it is___ too difficult"?
A.rather
B.much
C.far
D.quite
14.Which of the following is INCORRECT?
A.We know what each other thinks.
B.They know one another's weak points.
C.None of the books is interesting:
D.He didn't stay there so long as she.