21.The past 40 years have wiuiesscd diflcrcnt means of from bicycle kingdom to auto market.
A. transport B. challenge C. expression EX communication
22. Either the beautiful sights of this modem city or its local custom thousands of visitors during the past years.
A. have attracted B.were attracting
C.has attracted D.was attracting
23. More and more countries have come to realize that the worlddo without Huawei and its “more advanced4' technology.
A.can’t B.needn't C.mustn't D.shouldn't
24.Sometimes people from the south have difficulty understanding north say.
A. which B. what C. that D. how
