whether,if,when,which,who,why
1.--Oh,I can’t decide________of the three books I should buy.
-I think this one,Who Moved My Cheese,is the most interesting.
2.--Can you tell me_______the film will begin?
--At 8:10.
3.--Do you know_________your friend is so unhappy?
--Perhaps because he is missing his old school.
4.--Could you tell me_______the man in front of the car is?
--Sorry,I don’t know,either.
5.--Will David come to the birthday party?
--I am not interested in_______he’ll come or not.