---What is that? Is it an English learning machine?---Yes. It ________ us to improve our English.A. is used for helping B. used to help C. used to helping
I found ______ not very difficult to keep away from the A/H1N1 Flu.
— Oh, this cartoon book is very interesting. Where did you buy ____? I want to buy _____, too. — In the bookshop near my home.
——Dad, must I finish my homework today? ——No, you . You may do it tomorrow.
The Greens ______to France next weekend.
More and more students _________ too much homework and they are really tired of it.