It’s impossible for us to work out the Math problem in just 10 minutes. It’s too difficult.—You’re right. We can’t be _______ careful while working on it.

How do youget to school一I ______ toschool．

There is still some doubt ________ theautumn sports meet will be held in our school, but there is no doubt ________it will be held soon after our National Day holiday.

I’m glad that my parents have _______ of me buying a new car.

Chris is very clever and never wastes any time doinguseless things—No _______ he always comes first in the examinations