-- What can trees do _________ us ?
--- They can _________ harmful gases and produce oxygen .
| A．helping , take in | B．to help , take in | C．helping , take out | D．to help , take care |
There are so many foggy days these days. We all wonder .
A. how is the air polluted
B. why the air is polluted seriously
C. what are the real reasons
—I have trouble the passage. What shall I do?
—Remember it three times at least.
A. understanding, to read
B. understanding, reading
C. to understand, reading
—Do you consider yourself a rude person?
—not. I always have good manners.
A. ProbablyB. Usually C. Certainly
— I won’t choose either of the two shirts. They are too large for me.
— Well, I a small one for you.
A. was fetching B. fetchedC. will fetch
—May I speak to Mrs. Smith?
—I’ll see if she is in.
A. Look out!B. Hold on, please.C. Don’t give up.