—What did your parents think about your decision?—They always let me do ______ I think I should.
Every minute should be made use of_______ for the coming exam.
We all like the park _______ we visited last week.
He said that his car ______ stolen and he _______ have to telephone the police.
Those who have ______ floods and sandstorms know the importance of environmental protection.
He went _____to New York, without a stop in Hong Kong.