He has never done this type of work be

1、I shall be surprised if he does this t

I shall be surprised if he does this the same way（）I do.AasBwhichClikeDwhat

2、The ratio of the work done by the mac

The ratio of the work done by the machine______________the work done on it is called the efficiency of the machine.AagainstBwithCtoDfor

3、He is（） at doing this kind of job.

He is（） at doing this kind of job.AimefficientBnonefficientCunefficientDinefficient

4、He has been（）from the swimming race be

He has been（）from the swimming race because he did not win any of the practice races.AreducedBdeletedCeliminatedDdiminished

5、He is not aware（）what he has done.

He is not aware（）what he has done.AforBtoCaboutDof

6、This type of desk and chair can be adj

This type of desk and chair can be adjusted ______the height of students at different ages.A withB forC toD in