_______ there are many different types of food, some animals spend their lives eating only one type.
A．SinceB．UnlessC．OnceD．While
D

試題分析： A. Since 自從，既然，B. Unless除非，C. Once 一旦，曾經(jīng)，D. While 雖然，然而，當(dāng)…時(shí)候，句意：雖然魚很多種不同的食物，但是一些動(dòng)物一生只吃一種食物。表示轉(zhuǎn)折關(guān)系，所以選D。
練習(xí)冊(cè)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

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

________ I can see, there is only one possible way to keep away from the danger.
A．As far asB．a(chǎn)s long asC．Just asD．Even if

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Most of us value our time, but some of us treat it ________ it had no value at all.
A．even ifB．a(chǎn)s long asC．even soD．a(chǎn)s though

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

______ I always felt I would pass the exam, I never thought I would get an A.
A. While               B. Unless            C. If             D. Until

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—I rang you at about nine，but there was no reply．
—Oh，that was probably        I was seeing the doctor．
A．whyB．whenC．what D．that

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

As the interview rule goes，you can take some time to think through answers_______ you make a reply.
A．a(chǎn)fterB．whenC．beforeD．since

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—Do you know about the accident which happened in the center of the city?
—Yes. But it was some time           we realized the truth.
A．before B．whenC．sinceD．until

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

________ you have to do the job, you should try your best to do it well even though it may be very difficult for you.
A．SinceB．While
C．UnlessD．Though

查看答案和解析>>

同步練習(xí)冊(cè)答案