He started to work dilligently _____ he came up with the idea of hybrid rice for the first time in the 1960’s.
| A．at once | B．the moment | C．for the moment | D．in no time |
He is ___new comer to ___ chemistry but he has made a few important discoveries.
| A．/, / | B．a, / | C．a, the | D．the, the |
A large sum of money has been raised for the ____ of the poorly educated children in the mountainous districts.
| A．profit | B．favor | C．advantage | D．benefit |
--- Why hasn’t Jenny turned up?
--- Oh! She called me just now and said that she was _____ the way.
| A．by | B．in | C．at | D．on |
Excuse _____ you, but I have an important message for you.
| A．me to interrupt | B．for my being interrupted | C．my interrupting | D．me of interrupting |
_______ it is to go for a camp on such a fine day!
| A．What a fun | B．What fun | C．How funny | D．How a fun |