—Who called just now, Sam?—It’s Mona. She asked _____.
At times, parents find it difficult __________ with their teenage children.
We need __________ at the hotel for __________ because of the heavy snow.
— I think English is __________ unimportant subject.— I don’t think so. It is __________ useful tool when we talk with foreigners.
— __________ do the new hair clips cost? —They are only ten yuan.
—Happy Halloween, Kitty! —_________________