A.It; whether | B.There is ; that | C.It is ; that | D.There is; whether |
A.that | B.which | C.what | D.It |
A.because | B.what | C.why | D.which |
A.That | B.What | C.Which | D.Whether |
A.they both | B.both of which |
C.which both | D.both of them |
A.when | B.where |
C.which | D.while |
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