Many a student _____ that mistake before.
| A．hasmade | B．havemade | C．hasbeenmade | D．hadmade |
After ______ seemed a hopeless wait, four coal-miners trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.
| A．when | B．that |
| C．it | D．what |
The real secret to successful learning lies in students ______ an interest in what they are doing.
| A．to take | B．taking |
| C．taken | D．having taken |
---Fancy meeting you here, Lucy! I never thought you visit us today.
---Sorry, I forgot to tell you I was coming. I hope you don’t mind me ______.
| A．calling in | B．pulling in |
| C．breaking in | D．dropping in |
--- Was it by cutting down unnecessary expenditure ______ Mr. Simon saved the firm?
--- No, it was by improving work efficiency.
| A．when | B．what | C．how | D．that |
The house, ______ door often stays open until late at night, works as a home for the guards, some of ______ are from the countryside.
| A．whose; whom | B．which; whom |
| C．whose; them | D．where; them |