.The teacher used to stay up deep into the night. ______ , he made himself ill.
A. However B. Eventually C. Moreover D. Also
.What________ pity that you couldn’t be there to receive ________ prize!
A. a, a B. the, a C. the, the D. a, the
.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
