Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 0C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.
| A．which, where | B．whose, which | C．where, where | D．where, which |
Let’s go to the library for more books.I don’t think these all the problems of the subject.
| A．tell | B．show | C．find | D．cover |
I am too busy.I can’t a holiday.
| A．go | B．afford | C．pay | D．spend on |
so happened I was there.
| A．It;that | B．What;is | C．That;it | D．It;it |
The moment we had been looking forward to at last.
| A．coming | B．come | C．comes | D．came |
Accidents often out of carelessness.
| A．rise | B．raise | C．go up | D．arise |