..请说明理由...15.There are certain __ when you must interrupt people who are in the middle of doing something.A.conditions B.situations C.occasions D.environment 16.Lightning is a __ of electrical current from a cloud to the ground or one cloud

..请说明理由...15.There are certain __ when you must interrupt people who are in the middle of doing something.A.conditions B.situations C.occasions D.environment 16.Lightning is a __ of electrical current from a cloud to the ground or one cloud
..请说明理由...
15.There are certain __ when you must interrupt people who are in the middle of doing something.
A.conditions B.situations C.occasions D.environment
16.Lightning is a __ of electrical current from a cloud to the ground or one cloud to another.
A.rush B.rack C.ribbon
选什么?为什么?

..请说明理由...15.There are certain __ when you must interrupt people who are in the middle of doing something.A.conditions B.situations C.occasions D.environment 16.Lightning is a __ of electrical current from a cloud to the ground or one cloud
C场合打断别人 B电云电流

15. A
16. B

1.选c
A.conditions指条件比较多，例如 living conditions
生活条件
B.situations 指形势；局面，例如the international situation
国际形势。或者指位置，场所;the situation of a town一个城镇的位置.
C.occasions 指场合
D.environment ...

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1.选c
A.conditions指条件比较多，例如 living conditions
生活条件
B.situations 指形势；局面，例如the international situation
国际形势。或者指位置，场所;the situation of a town一个城镇的位置.
C.occasions 指场合
D.environment 指环境，周围的环境或者生态环境
2.我觉得选a
不是很确定
A.rush 冲；突进；急促跃进;a rush of water
B.rack 架, 行李架a hat- rack帽架.a plate- rack餐具架.a tool- rack工具架.
C.ribbon 缎带, 丝带, 带, 带状物, 带子
如果你知道答案了，能否告知？

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