It is said that the gravity on Mars is only about __________ of the gravity on earth．
| A．three-eighths | B．third-eighth | C．three-eighth | D．third-eighths |
----Have you finished writing the letter_______?
----Not ______
| A．just , already | B．already , just | C．ever , just | D．yet, yet |
He’s gone to the library ,_______ he ?
| A．isn’t | B．doesn’t | C．hasn’t | D．wasn’t |
---Did you get there by _____bike?
--- No, I took _____taxi.
| A．a, a | B．/,a | C．the , the | D．a , the |
—Why don’t you divide the students into six groups?
—_________.
| A．No, I don’t | B．That’s right |
| C．Sounds a good idea | D．Be more careful |
Mr. Green didn’t post the letter _________. He asked his son to do it for him.
| A．itself | B．myself | C．herself | D．himself |