The old man was remembered by people because he had （）many useful things during his life.

If you try all kinds of jobs，not only will you find out what you want to do，but you will also （）up a surprising amount of useful information as you go along.

A.pick
B.equipment
C.drug
D.director

点击查看答案&解析

We will （）all kinds of pollution（污染）control methods to protect our living conditions.

A.extra
B.according
C.cost
D.enforce

点击查看答案&解析