问题 单项选择题

矿山企业必须对作业场所中的有毒有害物质和井下空气()进行检测,保证符合安全要求

A.含氧量

B.沼气浓度

C.二氧化碳浓度

答案

参考答案:A

完形填空

I have two friends.        names are Lucy and Lily. They are twins(双胞胎). They        from the USA.

Lucy and Lily look the same.        have blue eyes and brown hair. They are thirteen      old. But they are in different clothes. Red is        favorite color. She is often(经常)in red. But this morning,        coat is yellow and her pants        blue and she has brown shoes. Lily likes green. This morning she is        a green skirt and her shoes are green, too.

They often help me with my English.        are in the same grade, but in different       .

小题1:A.Their               B.They                 C.Theirs

小题2:A.comes               B.come                C.is

小题3:A.They’re            B.They                 C.Their

小题4:A.year                B.year’s              C.years

小题5:A.Lucy’s             B.Lucy                 C.Lucys’

小题6:A.she             B.he                   C.her

小题7:A.are             B.is                   C.be

小题8:A.at                  B.from                 C.in

小题9:A.Our             B.We                   C.Us

小题10:A.class              B.classes              C.Grade

问答题 案例分析题