A.they have been shown | B.that has been shown |
C.that have been shown | D.which have been shown |
A.don’t they | B.haven’t they | C.do they | D.have they |
A.if | B.when | C.as | D.where |
A.when / had come | B.that / have come | C.when / came | D.that / had come |
A.helping | B.in help | C.to help | D.helped |
A.who | B.which | C.that | D.what |
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