Can you imagine what is Jack doing now? He is playing football outside while everyone else is busy in class!— He　　　　 his homework, I think.

During the flight to the Moon, Chang’e I Satellite gradually ________ her directions so that she can go into her programmed orbit.(2012· 福建“四地六校联考”)

Do I have to make dinner — .

Look, someone left a book.—Oh, yeah … This book ________be Kitty’s. Only she likes to read this kind of books.

It has been announced that students shall remain in their seats until all the papers ________.[ ]