At the beginning of the paragraph, specify whether it is a ____leave or a ____leave.
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We’d better use ____before the receiver’s name to show our respect.
I’d like to ____(申请)a leave for four days. I’ll be glad if you ____(批准我休假).
请大家在小组讲解前,完成P34的阅读理解选择题,并把答案填入下列空格内。(请填入小写字母abcd)
细胞膜的主要成分是( )
A. 磷脂
B. 蛋白质
C. 糖类