单项选择题
W: Have you made any plans yet for summer vacation, Brad? Don’t you want to go anywhere?M: Not really. I am not planning to go anywhere this year. What I’d like to do is to find a decent job.Q: What does Brad mean?（）
A．He doesn't have any idea about what he wants to do.B．He'd like to work this summer.C．He wonders whether the woman has a job.D．He can't decide where to go on vacation.
单项选择题 According to the passage, efficiency of e-mail is threatened by（）.
单项选择题 This passage is intended to give advice on（）.
单项选择题 羌特勒是一种野生蘑菇，生长在能为它提供所需糖分的寄主树木——例如道格拉斯冷杉下面。反过来，羌特勒在地下的根茎细丝可以分解这些糖分，并为其寄主提供养分和水分。正是因为这种互惠的关系，采割道格拉斯冷杉下面生长的羌特勒会给这种树木造成严重的伤害。 下面哪一个判断如果正确，对上面的结论提出了最强有力的质疑?（）
