主谓一致 14. Although the first part of the book is easy, the rest ______.B. has proved difficult C. is supposed difficult 为什么选B不能选C 谢谢

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主谓一致 14. Although the first part of the book is easy, the rest ______.B. has proved difficult        C. is supposed difficult  为什么选B不能选C 谢谢

主谓一致 14. Although the first part of the book is easy, the rest ______.B. has proved difficult C. is supposed difficult 为什么选B不能选C 谢谢
主谓一致 14. Although the first part of the book is easy, the rest ______.
B. has proved difficult

C. is supposed difficult 为什么选B不能选C 谢谢

主谓一致 14. Although the first part of the book is easy, the rest ______.B. has proved difficult C. is supposed difficult 为什么选B不能选C 谢谢
B.has proved difficult是被认为是难的,而 C.is supposed difficult 的用法不对,应是is supposed
to be difficult,且意思也不对,它的意思是“本应;本该”.