Hardly could he ____________ this amount of work in such a short time.

There is _______ “s” and _______ “u” in the word “study”.

The employee toimpress the company with his cleverness and promptness.

－Do you know that there are many different animals in the zoo －Yes, I do. And I also know that some of them are scary.

______________ with the sun, the earth isnot big at all.