小题1:— Will some people live on the moon in the future?

—_________, _________ _________ （肯定回答)

小题2:People will use some paper money in the future. (否定句)

People _________ use _________ paper money in the future.

小题3:We were listening to the teacher carefully when she came in.（对划线部分提问）

_________ _________ you _________ to the teacher carefully?

小题4:He got up after his mother came back. （改为同义句）

He_________ get up_________ his mother came back.   

小题5:Doctor said he could stand up after practicing more.（改为同义句）

Doctor said he ________ ________ ________ stand up after practicing more.

小题6:Why don’t you give it back to your friend on time?（改为同义句）

Why not ________ it ________ your friend on time?

与氧气混合点燃不可能发生爆炸的是（　　）

A．二氧化碳

B．天然气

C．氢气

D．煤气