As it turned out to be a small house party, we ______ so formally.
A. need not have dressed up
B. must not have dressed up
C. did not need to dress up
D. must not dress up
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______ is known to the world, Mark Twain is a great American writer.
A. That
B. Which
C. As
D. It
______ he works hard, I don’t find when he finishes the experiment.
As soon as B. As well as
B. C. So long as
C. D. So far as
Some companies have introduced flexible working time with less emphasis on pressure ______
A. than more on efficiency
B. than efficiency
C. and more on efficiency
D. and more than efficiency
I was advised to arrange for insurance ______ I needed medical treatment.
A. nevertheless B. although
B. C. in case
C. D. so that