Question

【题目】When the old man saw some litter on the ground, he quickly .
A.picked it up
B.picked up it
C.picked them up
D.picked up them.

Answer 1

【答案】A
【解析】句意：当老人看到地上的垃圾，他会很快地把它们捡起来，pick up sth为此意，sth为代词，应放在pick和up之间，垃圾为不可数名词用it，故本题选A。