Help others whenever you can _______ you will make the world a nicer place to li

Help others whenever you can _______ you will make the world a nicer place to li

题型:不详难度:来源:
Help others whenever you can _______ you will make the world a nicer place to live in.
A.andB.orC.unlessD.but

答案
A
解析
“祈使句+and+句子”表示“做某事……,那么……”。“祈使句+or+句子”表示“做某事……,否则……”。根据句意选A项。but意为“但是”;unless意为“如果不”;都不符合句型要求。
举一反三
We had to wait half an hour _______ we had already booked a table.
A.sinceB.althoughC.untilD.before

题型:不详难度:| 查看答案
You have to get rid of smoking, ____ you may die of lung cancer.
A.andB.butC.soD.otherwise

题型:不详难度:| 查看答案
----Won’t you go shopping with your mother ?
----____she promises to buy me a new sweater .
A When     B If    C Unless  D Whether
题型:不详难度:| 查看答案
It is three years_____ his father smoked .
A when  B after  C since  D while
题型:不详难度:| 查看答案
—____when has the country been open to international trade?
—1978,I suppose.
A.SinceB.In
C.FromD.After

题型:不详难度:| 查看答案
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