单项选择题
What do we learn from the conversation（）
A．The woman has to attend a summer course to graduate. B．The man thinks the woman can earn the credits. C．The woman is begging the man to let her pass the exam. D．The woman is going to graduate from summer school.
单项选择题 Often such arguments have the effect of （）rather than clarifying the issues involved.
单项选择题 He blew out the candle and （）his way to the door.
单项选择题 Hill slopes are cleared of forests to make way for crops, but this only （）the crisis.
