Question

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

A

本題的含義是當老人看到地上的垃圾，他會很快地把它們撿起來，pick up sth為此意，sth為代詞，應放在pick和up之間，垃圾為不可數名詞用it，故本題選A。