How long can I keep the books? — _____ [ ]

Excuse me, Mr Li, I don’t know the meaning of the whole sentence. What shall I do?You should _____ .

________ are you staying in the mountains?—For three days.[ ]

What should we do now, Mr. Clark?——Please turn to Page_____and look at the_____picture.

The teacher, with 6 girls and 8 boys of her class, ________ visiting a museum when the earthquake struck.