.
A terrible accident _______,however, occur the other day and we caught sight of it _______ accident.
| A．does; by | B．did; by | C．has to; on | D．had to; on |
All the books I have are here. You may borrow you like.
| A．whatever | B．whichever | C．whenever | D．however |
At the meeting they discussed three differentto solving the problem.
| A．approaches | B．means | C．methods | D．ways |
If you sleep less than 7 hours a day, you are moreto catch a cold.
| A．possible | B．certainly | C．probable | D．likely |
What I said was sothat I finally convinced themmy honesty.
| A．convincing; of | B．convincing, for |
| C．convinced; of | D．convinced; for |
Can you think of an occasion ______ you can use this gesture.
| A．which | B．that | C．when | D．on that |