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1.when,themetalexpands,andiftocoolitwillcontract.a.heated,allow.b.heated,allowed2.neitherofthetwopartiesabletosolvetheproblemsofthepoor.a.isb.are请说明

题目详情
1.when__,the metal expands,and if __ to cool it will contract.
a.heated,allow.b.heated,allowed
2.neither of the two parties__able to solve the problems of the poor.
a.is b.are
请说明
▼优质解答
答案和解析
1.when__,the metal expands,and if __ to cool it will contract.
a.heated,allow.b.heated,allowed
选:b.heated,allowed 过去分词表被动.
2.neither of the two parties__able to solve the problems of the poor.
a.is b.are
选:a.is neither作第三人称单数看待.