She is the only one of the girls in our class______ been to the United States.

I want to know more __________about how to use this word.—You can look it up in the dictionary.

Houses in Wuxi are now ______ expensive that ______ many people can’t afford ______ them.

Sally has a sister _______Class Two. They are twins.[ ]

Do you need some milk? —Yes, I .