Our monitor requested that ________.
| A．all the class studied more carefully the problem |
| B．the problem was more carefully studied |
| C．with great care the problem could be studied |
| D．all the class study the problem more carefully |
_ _______broken,the glass can not hold water.
| A．Once | B．After | C．On | D．Though |
_I had just started back for the house to change my clothes_______I heard voices.
| A．as | B．when | C．after | D．while |
_By success I don’t mean_______usually thought of when that word is used.
| A．what is | B．what has | C．that is | D．that has |
_For six or seven months in the year,no work can be done, _______the rainy season makes it impossible.
| A．while | B．until | C．before | D．when |
_Don’t answer me with a simple “yes” or “no”.Explain_______possible.
| A．whoever | B．whenever | C．however | D．whatever |