High-speed railways have developed rapidly in our country. Today China has ______ high-speed rail network (铁路网) among the countries in the world.
A.long B.longer C.the longer D.the longest
--- Mom, where is my model plane?
--- Oh, it ______ to Jenny yesterday.
A.is lent B.lends C.was lent D.lent
—Jerry, have you ever been to the Great Wall?
—Yes. I ______ there with my parents last year.
A.go B.went C.will go D.have been
—Listen! It's raining ______ outside.
—Wow, look! The yard is full of rainwater now!
A.strongly B.hardly C.greatly D.heavily
—The best ______ to come to Chongqing is spring.
—I think so.The green water and green mountains are unforgettable
A.season B.environment C.temperature D.journey
—What a heavy haze (霾)! The air pollution is terrible now.
—It will be worse ______ we take action to protect the environment.
A.if B.unless C.because D.although
