Learning a new sill _______ a long time.

A. spends   B. costs   C. takes   D. pays

I know that some foreigners _______ China a very strange country.

A. make    B. find　　 C. believe　　 D. think

We knew each other better ________.

A. day after day　　　　 B. day by day

C. day with day　　　　  D. day to day

That's all for the game. ________, why don't you join us?

A. On the way　　　　   B. In the way

C. By the way　　　　   D. In my way

We have been here for just _________ days.

A. a couple　　  B. a couple of　　 C. couple　　 D. couple of

Soon after that, they made ________ each other.

A. friends with　　　　　　　　  B. a friend with

C. friends to　　　　　　　　    D. a friend to