We can leave for Beijing _____________ bus. [ ]
A. to
B. by
C. of
D. for
答案：B
It’s rude to talk loudly.My mother won’t support such a________. [ ]
A．worry
B．behaviour
C．campaign
D．theory
维生素E延缓衰老可能是通过（）
A.调节血小板的黏附力和凝集作用
B.抗氧化作用
C.促进蛋白质合成
D.增加钙吸收
E.降低高血压
