问题补充:
So difficult did he find to pass the driving test that he decided to give up.
A. how
B. that
C. which
D. it
答案:
A. how
B. that
C. which
(答案→)D. it
解析:考查it的用法:这句话是倒装句,改成正常语序是He found it so difficult to pass the driving test that he decided to give up.句型是find it+adj+to do作形式宾主语替代不定式,句意:他发现通过驾驶测试是如此难,以至于他决定放弃。选D。