--- What do you think of the math problem ? --- It’s very hard and nobody has _______.
Hurry up! Once the concert starts, _______ is allowed to enter the concert hall.
-- I hear your grandpa has an old cup in your home.-- Yes. It ________ drinking tea long ago and my grandpa _______ drink tea with it when he was young.
If you don’t have enough exercise, you will _______ weight.
--_______ sweet music!--And I really like the Voice of China TV programs.
--Lucy is a(n) ______ student. She answers the teacher’s questions ______ in her class.