________ , I have to put it away and focus （集中）my attention on study this week．
A．However the story is amusing B．No matter amusing the story is
C．However amusing the story is D．No matter how the story is amusing
—Why weren’t you at the meeting?
—I ________ for a long-distance call from my aunt in America．
A．waited B．was waiting
C．had been waiting D．had waited
At the party, John made up a joke, people burst out laughing．
A．on which B．by which C．at which D．from which
If it had rained even a drop, things would be much better now and the crops in the fields ．
A．wouldn’t die B．didn’t die
C．hadn’t died D．wouldn’t have died
Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power．
A．since B． after C．unless D．before
She has made great progress in her studies but she said what she had achieved was________little compared to the teacher’s expectation．
A．so far B．too far C．far from D．far too
