“Simon wants to know if the Class 3 students___hiking tomorrow.” “Yes, but if it _____ , they’llvisit the museum instead.”

In western culture,21 was the age________ young people traditionally received a key to their parents’ door, as a symbol of entering adulthood.

This room is .

___________ you eat, ______________you will be.

Many tourists ________to the Great Wall every year.—Yes, that’s true.