—Must we keep the window _______ all the time? —No, you don’t have to.
He used to go to work by car. The underline word “used” is pronounced________.
---Your new blouse looks very beautiful. Is it _____silk?---Yes. It’s _______ Hangzhou.
As we know, zoos provide homes _____many endangered animals.
She’s never been to a foreign country, ______?A doesn’t she B. has she C. is she D. hasn’t she
---How does Jack usually go to school? ---He_____________ride a bike, but now he_______________there to lose weight.