Mary dropped in ____ Mr Smith, but he  wasn" t at home, so she went to drop in _

Mary dropped in ____ Mr Smith, but he  wasn" t at home, so she went to drop in _

题型:不详难度:来源:
Mary dropped in ____ Mr Smith, but he  wasn" t at home, so she went to drop in ____ Mr Smith"s office.          
A.on, onB.at, atC.on. atD.at. on

答案
C
解析

举一反三
The teacher is not only strict ____ his pupils but also strict ____ his own work.
A.with, withB.in,inC.in, withD.with, in

题型:不详难度:| 查看答案
His grandfather died ____ the wound that the enemy soldier had given him .and then his grand-
mother died ____ hungry and cold.        
A.from,ofB.of,fromC.from,fromD.of.of

题型:不详难度:| 查看答案
If you run ____ two hares you will catch neither.   
A.intoB.afterC.offD.out of

题型:不详难度:| 查看答案
This is a common mistake ____ students.                  
A.betweenB.overC.amongD.about

题型:不详难度:| 查看答案
My father began to work ____ a bus driver when he was twenty years old.
A.forB.toC.atD.as

题型:不详难度:| 查看答案
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