About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
A．is; doesn’t B．a(chǎn)re; don’t C．a(chǎn)re; doesn’t D．is; don’t
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

.
My brother left home five years ago. I _______ nothing from him up to now.
A．hearB．heardC．have heardD．had heard

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

The old man insisted that I ____ his wallet and that I ____ with him to the police station.
A．take, goB．had taken, goC．took, goD．had taken, went

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


Scientists ______ SARS for several months before a major discovery was made in the field.
A．had been studyingB．have been studying
C．have studiedD．a(chǎn)re studying

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


When and where he came here _______ yet.
A．isn’t knownB．a(chǎn)ren’t knownC．has not knownD．have not been known

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


We all think it is Mr Wang as well as his parents that _______ for his son’s bad performance at school.
A．a(chǎn)re to blameB．is to be blamedC．a(chǎn)re to be blamedD．is to blame

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


—How come you still work here? I hear your company has bought a new office building.
—But the newly-bought building_______ .
A．has decoratedB．is decoratedC．is being decoratedD．will be decorated

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題


The day they were looking forward to _________ at last.
A．cameB．comingC．comeD．comes

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：單選題

Mary is absent from school today because he __ a cold.
A．catchesB．had caughtC．has caughtD．will catch

查看答案和解析>>

同步練習(xí)冊(cè)答案