—Why did you cancel your trip to the New York?
—We were just about to leave_______ it started to snow．
A．when B．before C．after D．since
Many difficulties have _____ owing to the change over a new type of fuel．
A．raised B．aroused C．arisen D．risen
I suggested the cheat referred ______ put into prison．
A．to being B．was C．to be D．should be
“Harry Potter” is such an interesting book ______ all kids like to read．
A．as B．that C．what D．which
_____ scores of times , but he still couldn’t understand it ．
A．Having explained B．Having been explained
C．Though it was explained D．It was explained
______ delighted me most was ______ my daughter was admitted to Beijing University．
A．That, what B．What, that C．What, what D．That, that
