【推荐1】I told them ________ they could do during the holiday.

A．weather

B．if

C．whether

D．what

【推荐2】I don't doubt ________ she can do it well, but I doubt ________ she is willing to do it.

A．that; that

B．if; if

C．that; if

D．if; that

【推荐3】I don’t know _______ he will come tomorrow. _______ he comes, I’ll let you know.

A．if, whether

B．whether, If

C．while, If

【推荐1】—Could you please tell me ________?          
—For about twenty years.

A．how long have your parents married	B．how long have your parents been married
C．how long your parents have married	D．how long your parents have been married

【推荐2】Somebody asked ________．

A．when did he get the letter

B．when getting the letter

C．when he got the letter

【推荐3】My classmates worked out the difficult math problem at last, but I still don’t know________.

A．how they made it	B．how did they make it
C．why did they make it	D．why they made it

【推荐1】We are not sure if it __________ tomorrow. If it __________, we won't go hiking.

A．snows; snows	B．snows; will snow
C．will snow; will snow	D．will snow; snows

【推荐2】The boy asked his father ________.

A．what life will be like in the year 2100

B．who was the computer invented by

C．how he called the man in a black suit

D．if Shakespeare was a great writer of English literature

【推荐3】They have little doubt ________ the project will be a great success, though they are not sure   ________ they will have enough money to carry on with it.

A．that, whether

B．whether, whether

C．whether, that

D．that, that