—Is there any vaccine(疫苗) against H1N1 flu that can be used on humans?
—No, but scientists are working to develop ________ .
A．thatB．itC．oneD．so
C
考查指示代詞�！坝心軌蛴迷谌祟惿砩系�，抵抗H1N1病毒的疫苗嗎？”“沒有，但是，科學(xué)家正在努力工作來研制一種。這里是泛指一種疫苗，應(yīng)該用one。故選C。”
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題

— Jane and Maria look exactly the same to me.
— Oh, sometimes it’s hard for me to tell one twine from____.
A．a(chǎn)notherB．others C．the other D．the others

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

You must keep ____ in mind _____ your are a student in this school and should obey the school rules.
A．it ; that B．everything ; whichC．such ; as D．something; because

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


Is this school ______you have studied in for four years?
A．in whichB．whereC．thatD．the one

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


Jack recommended me a few foreign movies, but _______ was to my taste.
A．nothingB．neither
C．someD．none

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


If I can help ____, I don’t like working late into the night.
A．soB．thatC．itD．them

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


I find _____ difficult for us to master English if we don’t work hard.
A．thatB．itC．thisD．what

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


I would rather buy a house in the beautiful and quiet suburb than _______ in the crowded city.
　   
A．itB．one　　　C．this　　　D．that

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


________seemed to be no possibility for him to turn up at the meeting.
A．It B．HeC．ThereD．This

查看答案和解析>>

同步練習(xí)冊答案