(1) I don’t know ___________or not.
A. whether he is at home B. if he is at home C. whether is he at home
(2) This depends on _________ the weather is fine.
A. which B. whether C. if
(3) The teacher asked the new student ________ class he was in.
A. which B. where C. if
(4) I don’t know ____ Mr. Green will come to see us. He’ll help us with our English.
A. why B. when C. how
(5) --- Be careful! Don’t break the bottles. Do you hear ______ I said? David? --- Yes, Mum
A. what B. that C. why
(6) --- Do you know _______ Mr Black’s address is?
--- He may live at NO.18 or No. 19 of Bridge Street. I’m not sure of it.
A.which B. where, C. what,
