If you want to buy an expensive camera, we have several models for you ________.

— He is working hard now.
— He tries ___ English. So he practices ___ English every day.

— Thank you for ______ me _______ the housework. —My pleasure.

—What did you do during your summer holiday?
—I spent my holiday _____ English in summer classes.
A. improving             B. improves            C. to improve

—Must we keep the window _______ all the time?
—No, you don’t have to.
A.opening   B.opened      C. open

Please stop________ . I can’t hear __________ .

---Is tea ready?
---No, mother is ________ it ready now?

---I’m sorry, Linda. I’m late.
--- Oh, Kate. You have kept me ________ for you for half an hour.

---What should we do next?
--- The first thing is ________ a hotel ________.

—What should I do, doctor?
—___healthy, you should take more exercise.