—can we find your brother at weekends?— On the football field。
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 _____.
The kids are looking forward to ______ Spring Festival.
Everyone in the class studied very hard since no one wanted to _____. A. fall down B fall off C. fall behind D. fall out