.Water, which seems to be so simple and common, is ______ makes life possible.
A. that B. which C. what D. where
The number of students in this college _____ by 10% every year.
A. rises B. lifts C. raises D. arises
.______ the beginning of the 19th century did scientists know that all matter is made up of atoms.
A. At B. By C. Up to D. Not until
Many people believe that _______ will takes years to develop a car that does not pollute the air.
A. it B. that C. there D. this
They have been woking on this project for one month. It seems they need ________ month to finish it.
A. more B.other C. another D. the other
________your generous help, we could not be living a happy life today.
A. Despite B. But for C. Because of D. As long as
