I think it’s impossible for us to work out the plan in just two days. It’s too difficult.—-You’re right. We can’t be _______ careful and hard while working on it.

Kitty said that she had grown crazy about nature because she hadn’t been ____ too long [ ]

It was the driver rather than the passengers who was to for the accident.

What are you going to do with so many vegetables?—Well, ______ allow them to go bad, I will sell them at half price.

More than 800,000 Chinese overseas students have returned in the last five years, with the annual number ______ by an average rate of 36 percent each year.