. Nowhere in nature is aluminum found free, owing to its always ?____? with other elements, most commonly with oxygen.?
A. being combined B. having combined?
C. to combineD. combined?
2. Physics is the present?day equivalent of ?____? used to be called natural philosophy, from ?____? most of present?day science arose.?
A. which, whatB. that, which ?
C. what, whichD. what, that?
3. On no account ?____? ever leave the baby at home alone.?
A. should youB. you shouldC. shall youD. you shall?
4. ?____?the center of our planetary system was considered as heresy by the church in the Middle Ages.?
A. It is the sun and not the earth ?
B. That the sun and not the earth?
C. Being the sun and not the earth?
D. The sun and not the earth?
5. The reason that his property was confiscated by the country, it ?____?, was that he was involved in a lot of fraudulent activities during the war.?
A. was turned outB. was being turned out?
C. being turned out D. turned out?
6. I’d rather you ?____? by train because the weather forecast said there would be heavy snow tomorrow.?
A. wentB. shouldgoC. will goD. go?
7. Einstein won the Nobel Prize in 1921 and enjoyed great fame in Germany until
the rise of Nazism ?____? he was expelled from Germany because he was a Jew.?
A. whenB. whoC. thenD. which?
8. Nowhere but in the remotest region of the country ?____?find a place to settle down.?
A. can heB. he canC. heD. for him to?
9. With one leg broken in that car accident, he cannot even walk, ?____? run.
A. let alone B. that’s to say ?
C. not to speak D. not to mention?
10. ?____?, she led a life of complete seclusion.?
A. Being disgracedB. Disgraced?
C. DisgracingD. She was disgraced?