A.must | B.can | C.will | D.may |
A.has turned out | B.has been turned out | C.is turning out | D.is turned out |
A.whose | B.which |
C.of which | D.which of |
A.he explained | B.what he explained | C.how he explained | D.why he explained |
A.which | B.who | C.that | D.what |
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