The bus hit the huge stone by the road heavily _________ he could stop it.
A. after B. before C since D. until
.
When ___ help, one says “Thank you” while when _________ help, one asks “Can I help you?”
| A．offered; offered | B．offering; offered |
| C．offering; offering | D．offered; offering |
.
The key point is not who said the words, _________ they are true or not．
| A．but whether | B．and whether | C．but how | D．and how |
.
As I know, it is five years since Mary _________ in the south．
| A．lives | B．lived | C．has lived | D．was living |
.
Jim is _________ person, and everyone is willing to be with him．
| A．so kind a; friends | B．so a kind; friend |
| C．such kind a; friends | D．such a kind; friend |
.
．_________ the teacher couldn’t understand was _________ fewer and fewer students showed interest in her lessons．
| A．What; why | B．That; what | C．What; because | D．Why; that |