—A number of students________in the dining hall.—Let me count.The number of the students________about 400.A.are;isB.is;areC.are;are
The conference has been held to discuss the effect of tourism(旅游业) ___ the wildlife in the area.
Sandra was a student ____ the age of 21.
Scientists say they are beginning to _____ in the fight against cancer.
As the spring comes, the flowers began to _____.
As we all know(众所周知), the dinosaur has _____.