I think the telephone is the second ___ A.helpful B.more hel
I think the telephone is the second ___ A.helpful B.more helpful C.most helpful D.the most h...
I think the telephone is the second ___
A.helpful B.more helpful C.most helpful D.the most helpful
I think the telephone is the second ___
A.helpful B.more helpful C.most helpful D.the most helpful
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你能帮帮他们吗