It wasn’t until then _______ their marriage was breaking up because they had little in common.
| A．did I realize | B．that I realized | C．had I realize | D．when I realized |
Everybody sits and waits in the shade of the trees while the family begins to wake up and ______.
| A．move off | B．move on | C．move out | D．move in |
They are putting too much carbon dioxide into the atmosphere, ______ prevents heat from escaping from the earth into space.
| A．what | B．that | C．which | D．who |
----I’m thinking of the test tomorrow, I’m afraid I can’t pass this time.
----! I’m sure you’ll make it.
| A．Go ahead | B．Good luck | C．No problem | D．Cheer up |
I bought a sweater for only 50 yuan yesterday; it was a real .
| A．trade | B．exchange | C．bargain | D．business |
----Say, Jane, will you come with me to the game Friday?
---- , Bob, but I promised Mary I’d go with her.
| A．Forget it | B．Thanks | C．Take it easy | D．My pleasure |