He’s aiming ________a prize. That is why he puts his heart ________ his work.
| A．at; of | B．to; off |
| C．for; away | D．at; into |
Please do me a favor —______ my friend Mr. Smith to Youth Theater at 7:30 tonight.
| A．to invite | B．inviting | C．invite | D．invited |
______ herself with other girls, she feels she is quite lucky.
| A．Comparing | B．Compared | C．To compare | D．Being compared |
— Lovely weather, isn’t it?
— Yes, a bit hot, ______.
| A．although | B．but | C．though | D．yet |
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 |
. Garter Druse ______ his being selected for the important task to his courage，devotion and knowledge of the area.
| A．led | B．owed | C．devoted | D．contributed |