________is over 5,000 years old. It has the biggest population in the world. It's a lot bigger than that of the United States.
A.Canada B.England C.China
—Could you tell me ________?
—He has a sore neck, because he sat in the same way for too long without moving.
A.which is the way to the hospital
B.what is the matter with Tonny
C.what the matter is with Tonny
I will never forget the teachers in Hongqiao ________have helped me a lot whenever I have trouble ________during the last four years.
A.where, to study B.that, studying C.which, studying
A terrible disaster ________COVID-19（新冠肺炎）is happening to the earth, we should do more things we can ________the wild animals instead of killing them freely.
A.is named, protect B.named, to protect C.named, protecting
Skimming（略读）is used when our purpose is to quickly get a general idea about the reading material.
The skimming is one of ________styles when you have to read a lot of material in a moment.
A.much useful B.more useful C.the most useful
—Where are you going for fun in the coming summer vacation?
—I ________ go to Europe, but it depends on my mother's plan.
A.must B.may C.need
