— Which of the caps will you take?—I’ll take______ , one for my father, the other for my mother.

We shouldn’t take         for granted that we still have a lot of time before the Entrance   Examination.

The two girls are so alike that strangers find ____ difficult to tell one from the other.

The thought of going back home was _______ kept him happy while he was working abroad.

One of the first foreign expeditions _______ Mount Qomolangma arrived in Tibet in 1921.