Smoking is bad for your health. You'd better _______.
A：give it up
B：give up it
C：take it out
D：take out it
写出下列词语的近义词
清澈——____ 脆弱——____ 骄傲——____
某种动物繁殖量y（只）与时间x（年）的关系为y=alog3（x+1），设这种动物第2年有100只，到第8年它们将发展到（ ）
I hate it when she calls me at work—I'm always too busy to _____ a conversation with her.
