---Thank you for your explanation. Now I understand what our teacher said.

----________.

A. You’re very clever.   B. My pleasure C. No, thanks     D. Don’t  say

—Would you like to tell me what our teacher said just now??

—She said that light__________faster than sound.?

A.travels

B.traveled

C.would travel

D.was traveling

—Lydia, what did you hear our teacher said just now?

—Every boy and every girl as well as the teachers who ________ to lead the group ________ asked to be at the school gate before 6∶30 in the morning.

A．is; is 

B．are; are

C．are; is 

D．is; are

“_______,” our teacher said, “it can’t be that bad. We’ll be better and better soon.”

A. Look up           B. Stand up           C. Warm up        D. Cheer up

Our teacher said to us that the earth _________ around the sun.

A．travelled          B．travels            C．is traveling         D．was traveling