＿＿＿＿＿ of our school is covered with trees and grass.
| A．Third-one | B．One-threeth |
| C．One-third | D．One-thirds |
— Could you tell me_?
—Sorry, I don’t know.
A. When will the plane take off
B. When the plane will take off
C. When would the plane take off
－What time will Diana get to Chengdu?
－I’m not sure. When he ________, I’ll call you.
A. will arrive B. arrive C. arrives
－Where is John?
－He ______ the science lab.
A. has gone to B. has been to C. went to
－How about having a picnic with me?
－I’d love to, ______ I’m afraid I have no time.
A. so B. and C. but
－Dad, may I watch TV?
－No, you can’t. You _______ finish your homework first.
A. must B. can C. may