1.My grandpa often complains about his _____ teeth.
A artificial B man-made C false D unreal
(答案是C,为什么不选B或D呢?)
2.It rained a few times during our holiday but on the _____ the weather was fine.
A general B day C whole D program
(C,为什么不是A呢?)
3.Two much rain in the spring ____ the growth of wheat in this district.
A held up B held off C held out D held on
(A,为什么? 其他几项是什么意思呢?)
4.Let the boys play in the woods ;they will come no _____.
A hurt B harm C risk D danger
(B,为什么不是D?)