A.the chairman | B.chairman | C.a chairman | D.chairmen |
A.do | B.doing | C.done | D.to do |
A.What | B.It | C.There | D.Anything |
A.it a rule | B.a rule | C.the rule | D.a rule it |
A.Whether | B.When | C.That | D.Why |
A.It; what | B.What; what | C.What; how | D.It; how |
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