an I do for you– If you __________ see Mr Smith, give him myregards

It’s exciting to hear 24st Winter Olympic Games will be held in Beijing.—We are sure it will be ________big success.

I won’tgive you such help ______ you tell me the truth. It’s beyond my ability.

Newly-developed materials for spaceships can _____ extreme weather conditions.[ ]

Please clean the room at once, it’s too ______.