—Jack is doing nothing at all but study Chinese.—As far as I know he is to study abroad

问题补充：

—Jack is doing nothing at all but study Chinese.

—As far as I know, he is to study abroad, perhaps China.

A. possible

B. likely

C. impossible

D. unlikely

答案：

A. possible

(答案→)B. likely

C. impossible

D. unlikely

解析：句意：--杰克现在什么都没有做除了学习汉语外。--据我所知，他可能在国外学习也许是在中国。possible可能；likely可能；impossible不可能；unlikely不大可能。

It is/was+possible/impossible+(for sb)+to do; S+be+ likely/ unlikely +to do;它们都有的句型是It is/was+～+that-clause;根据句意故选B。