A.What is required | B.What requires | C.It is required | D.It requires |
A.that; who | B.which; that | C.whose; that | D.whose; who |
A.what what | B.that that | C.that if | D.that what |
A.what | B.Which | C.that | D.whether |
A.While | B.If | C.In case | D.Before |
A.What | B.Who | C.That | D.Whether |
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