—Whose exam paper is it?

—It             be Li Lei's. He always forgets to write his name on it . [ ]

A. can't

B. must

C. shouldn't

D. may

加工渐进多焦点眼镜时注意移心时要保持镜片的隐性刻印的连线与模板的水平中心线平行，还要注意模板与镜片的（）同向。

A、鼻侧或上侧

B、鼻侧和上侧

C、鼻侧和下侧

D、上侧和颞侧