【正文】 !A．magazines B．photos C．phones D．works16．Yuan Longping is considered to have made a great _________ to the development of agriculture.A．progress B．invention C．introduction D．contribution17．Yancheng Nature Reserve covers an ______ of over 45,000 square kilometers. It is one of the world’s most important wetlands.A．a(chǎn)rea B．object C．space D．population18．–Could you give me a few ______ on how to spend the ing summer holiday?OK. Let me see.A．hobbies B．knowledge C．suggestions D．information19．The ____of antibiotics(抗生素) in the 20th century has made a great difference to us.A．invention B．instruction C．method D．discovery20．The ________ on the desk is for you. It says Mr. Lee is ing to visit you tomorrow.A．a(chǎn)dvice B．lesson C．paper D．message21．All the ________ was for nothing because the visit was cancelled. Put it away now.A．pollution B．connection C．suggestion D．preparation22．—Why are you so crazy about travelling, Wu Dong?—Travelling can offer us real________of languages, customs and cultures.A．a(chǎn)ttraction B．background C．difference D．experience23．— Do you really think you can learn that much in only a couple of hours?— Yes. We will try a very useful ________ of dealing with memory problems.A．report B．process C．method D．a(chǎn)ctivity24．—I really admire these scientists in different fields in our country.—I agree. They have made a great ________ to our country, even to the world.A．celebration B．conversation C．contribution D．introduction25．Because of the outbreak of Corona virus, people all over the world are keeping a close eye on medical ________ of Chinese medicine, like Lianhuaqingwen Capsule (膠囊).A．value B．price C．cost D．wealth26．One person’s ________ doesn’t depend on how much money he has made, but on how many contributions he has made to our country.A．experience B．value C．wealth D．career27．With the development of the service industry, the working ________ is increasing and more jobs should be offered.A．invention B．pronunciation C．introduction D．population28．I was attracted by the lady’s warm smile. It was really like a hidden ________ .A．pleasure B．treasure C．a(chǎn)ttention D．invention29．—Why did the artist make no ________ to be understood or liked?—He didn’t care what others think of him.A．risk B．effort C．suggestion D．balance30．—Do you know a Chinese called ChenGao?—Exactly, his ________ makes the whole world shocked and he bees the youngest PHD supervisor（博導(dǎo)）in Math area.A．a(chǎn)dvantage B．progress C．a(chǎn)chievement D．a(chǎn)ttention31．—Searching for information is not a big deal today.—Exactly, the ________ is how we can tell whether the information is true or not.A．a(chǎn)dvantage B．message C．challenge D．knowledge32．— Do you stay up at night and get up late in the morning just like me?