- The air pollution is terrible.
- It will be worse ________ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
This is _____ ID card and that is _______ book.
A. a, an B. an; an C. an; a
—How ______ you ? — I ______fine. Thank you.
A. are; is B. are; am C. am; are
I like the places ________ the weather is warm.
A. that B. where C. which
-- Whose notebook is this ?
-- It _______ Mary. It has her name on it.
A. must be B. can’t belong C. must belong to
-- I had a big fight with my friend yesterday. What should I do ?
-- If I _______ you, I would say sorry to her.
A. am B. was C. were