题目内容

Mr．Chen：May I ask you a question？Mr．Green：Yes，__________.Mr．Chen：Haven’t we met before？Mr．Green：Yes，we met at the sales conference last year in Beijing．

A. do it
B. please
C. all fight’
D. say it

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Lin：Tom，I had a really good time at your home． Tom：__________．

A. Oh，I"m glad to hear that
B. You’re welcome
C. Thanks a lot
Don’t mention it

双子叶植物的叶上下两个面形态、结构有明显的差别，被称为( )叶，禾本科植物叶没有腹背之分，被称为( )叶。

When he arrived at the village，he found__________ the aged and the sick at home．

A. none but
B. anyone but
C. nothing but
D. no other than

双子叶植物根的次生生长过程中，次生分生组织之一的木栓形成层一般产生于中柱鞘细胞。( )