第二部分：词汇知识运用（共两小节，满分40分）
第一节：多项选择（共10小题；每小题1分，满分10分）
21.When in contact with hot surfaces, the material can___________ poisonous gases.
A.give away B.give up C.give in D.give off
22.He always__________ my kindness and borrows money from me, but never has he paid me back.
A.takes advantagt of B.makes fun of C.pays attention to D.plays tricks on
