【正文】 ger B．volunteer C．trainer D．teacher11．My grandmother knows the history and medical ________ of many plants.A．wealth B．price C．value D．cost12．—We have entered a world where robot operations bee true with 5G technology.—Hard to believe! Scientists are full of ________ which leads to great changes in our life.A．instruction B．instrument C．invention D．introduction13．I39。m sure Cindy will make it to the hotel. She has a good ________ of directions.A．idea B．feeling C．experience D．sense14．Yuan Longping is considered to have made a great _________ to the development of agriculture.A．progress B．invention C．introduction D．contribution15．When autumn es, the ________ will turn yellow, and fall from the tree.A．mountains B．leaves C．birds D．plants16．—The air is very fresh in our city. There is less _______ than before.—Yes. The government has taken action to protect the environment.A．wood B．pollution C．noise D．water17．For the time being we can collect much ________ either from books or on the Internet.A．idea B．method C．information D．suggestion18．–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 visitor told a very ______story about what he did for a ______in Africa.A．lively；living B．lively；life C．living；living D．a(chǎn)live； live20．Learning English in a classroom is important, but using English in the real ________ will improve your English skills greatly.A．condition B．situation C．event D．position21．—Do you know a Chinese called ChenGao?—Exactly, his ________ makes the whole world shocked and he bees the youngest PHD supervisor（博導）in Math area.A．a(chǎn)dvantage B．progress C．a(chǎn)chievement D．a(chǎn)ttention22．—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．introduction23．—Sophie, I can carry the heavy bag for you, if you can39。s a very kind________. Thanks a lot.A．promise B．service C．offer D．suggestion24．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．wealth25．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．career26．Life is like riding a bicycle. To keep your ________, you must keep moving.A．promise B．position C．balance D．a(chǎn)bility27．With the development of the service industry, the working ________ is increasing and more jobs should be offered.A．invention B．pronunciation C．intro