About ________ percent of the earth's surface is covered with water.
How many do you have ?A.English books B. English C. English book
Let’s _______ and see . A.go B.to go C.going
---Let me help you ---_______________A. Thank you B. Here you are. C. You’re right.
Put your maths book ______ your desk .A.at B.on C.the
I have __________ English book. A.a B.6 C. an