I’m sorry you’ve been waiting for so long, but it’ll still be some time _______ Brian gets back.
| A．since | B．after | C．when | D．before |
—Where is my blue shirt?
— It’s in the washing machine. You have to wear ____ different one.
| A．any | B．the | C．a | D．other |
There’s ____ dictionary on ____ desk by your side.
| A．a; the | B．a; a | C．the; a | D．the; the |
The sign reads “In case of ____ fire, break the glass and push ____ red button. ”
| A．不填；a | B．不填；the | C．the; the | D．a; a |
Seeing the soldiers well _____ for the flood-fight, the general nodded with satisfaction.
| A．prepare | B．preparing | C．prepared | D．having prepared |
Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.
| A．to do | B．to have done | C．to be doing | D．to have been doing |