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______is necessary for people to develop strong bones and teeth.A、That calciumB
______is necessary for people to develop strong bones and teeth.A、That calciumB
游客
2025-01-22
19
管理
问题
______is necessary for people to develop strong bones and teeth.
选项
A、That calcium
B、Calcium
C、It is calcium
D、Although calcium
答案
B
解析
结构识别专有名词前一般不用冠词,calcium钙;选项C是强调句的句式,但后面需跟that,选项D是让步状语从句的一部分;而划线部分需填一个主语,因此答案为B。
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