--How long are you staying ?
-- I don't know ．______.
A．It depends． B．That's OK． C．Never mind． D．It doesn't matter.
The Olympic Games are held _____.
A．for four years B．each four year
C．every four years D．every fourth year
This area experienced ____ heaviest rainfall in ____ month of May.
A．/ ; a B．a; the C．the ; a D．the ;the
We offered these students a summer course ,aimed _____ improving their spoken English.
A．to B．of C．at D．for
--I can't find John .Where did you meet him this morning?
-- It was in the hotel _____ he stayed．
A．why B．where C．which D．What
Don't ____ when other people are talking.
A．cut through B．cut across C．cut into D．cut in
