_______________.

【名词&注释】

二氧化硫、一氧化碳(carbon monoxide)、二氧化碳、二氧化氮、“温室效应”

[单选题]_______________.

A. shines
B. drops
C. puts
D. fits

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举一反三：

[单选题]________

A. feelings
B. stories
C. lives
D. memories

[单选题]17．

A. am
B. is
C. are
D. isn’t

[多选题]—It’s cold today. You’d better _________ your sweater. 学科网 —OK. I will.学科网

—It’s cold today. You’d better _________ your sweater. —OK. I will.

A. p—It’s cold today. You’d better _________ your sweater.
B. put on B．turn on C．get on

[单选题]Mr Brown is Tom's ___

A. mother
B. aunt
C. sister
D. father

[单选题]造成“温室效应”的主要物质是

A. 二氧化氮
B. 二氧化硫
C. 一氧化碳
D. 二氧化碳

[单选题]16．A runs

A. ran
B. running
C. run

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