So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.
| A．when | B．that | C．before | D．unless |
The man and the horse _____ fell into the river were drowned.
| A．Which | B．who | C．that | D．of which |
----- Mr. Chen is a teacher and works very hard.
-----_______ his wife.
| A．So does | B．Do I | C．So it is with | D．It is same with |
____ he has been chosen to work as a teacher in the mountain village ____ him feel very proud.
| A．That, make | B．Whether, makes | C．That, makes | D．Where, make |
The question is very important. It really needs _______.
| A．carefully discussing | B．carefully to discuss |
| C．to carefully be discussed | D．being discussed carefully |
Follow the directions on the bottle carefully when _______.
| A．you will take the medicine | B．taking the medicine |
| C．to take the medicine | D．taken the medicine |