高中英语从属连词完型填空

________ she was invited to the ball made her very happy.

A．Whether B．That C．Because D．What

--- Look at those clouds!     --- Don’t worry. _______ it rains, we’ll still have a great time.   

A．As if B．Even if C．As though D．If

How long do you think it will be_________we finish this dictlonary?

A．after B．before C．when D．since

5．Jurors said there was no clear evidence_________they meant to mislead investors.

A．which B．that C．what D．When

31．—My son is addicted to drugs．He isn’t hopeless，is he?
—Yes，    he mends his ways and starts all over．

A．if B．when C．even if D．Unless