We will climb the 
mounta
in tomorrow_it doesn't rain.
A. if B. although C. since
—_______ do you clean your room?
— Every day.
| A．How long | B．How many | C．How often | D．How soon |
—Wuhu is a beautiful city.
— Yes, and I feel ______ to live there.
| A．comfortable | B．worried | C．afraid | D．tired |
English is _________ international language.
| A．a | B．an | C．/ | D．the |
We'll hold a party in celebration of the 90th birthday of the CPC （中国共产党）
_________ Friday.
A. in B. on C. at
—Miss Zhou is very popular with the students.
—Yes. Her classes are_________ lively and interesting.
A. always B. sometimes C. hardly