单项选择题

A．They defend the bone against viruses.
B．They prevent oxygen from entering the bone.
C．They break down bone tissue.
D．They connect the bone to muscle tissue.
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单项选择题
A．She will help him.B．She finished hers two days ago.C．She completed her work very quickly.D．She is still doing the project.
A．She will help him.
B．She finished hers two days ago.
C．She completed her work very quickly.
D．She is still doing the project.
单项选择题
A．She’’d be able to leave quickly.B．She’’d be less nervous.C．She’’d be able to locate where the man was seated.D．She’’d know when her professor arrived.
A．She’’d be able to leave quickly.
B．She’’d be less nervous.
C．She’’d be able to locate where the man was seated.
D．She’’d know when her professor arrived.
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