(   ) 31. —May I speak to Tom?

¡¡¡¡¡¡    —Sorry, he _______ Japan. But he _______ in two days.

A. has been to; will come back       B. has gone to; will be back

C. has gone to; would come back    

(   ) 32. The population of China is______ than________ of any other country in the world.

        A. larger, the one          B. more, that         C. larger, that

(   ) 33. Tom made a few friends in China and he __________them by e-mail last year.

A. keeps in touch with          B. keeps up with      C .kept in touch with