--Which do you prefer, Simon ,tea or milk ?-- ______ is OK . I don't mind .

--How many students have passed the examination?    -- _______.

 — How many students are going to the Great Wall? — ____.

—Shall I attend my friend's coming­of­age ceremony, Mum?—No, unless you see to ________ that you will be home before 1000 PM.

The conflict between Gadhafi’s government army and the rebels in Libya made ______ difficult for the foreigners to leave the country.