--Which do you prefer, tea or coffee?-- __________is OK.I don’t care.

The cost of renting a house in central Yuxi is higher than ______ in any other area of the city.

— Who helped Li Lei with his English?   —         , he learnt it by himself. 

If I can help      , I don’t like working late into the night.

________ arouses his interest can be found in the school library and that is why he goes there ________ happens.