"Autumn" is also called _____ in American English.
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
No matter how hard it is, just go on and never ____.
While you are doing math exercise, put a calculator(计算器) ____ to help you.
Here you are! This is one of the keys ____ the lock.