No matter _____ he is able to come to the party or not, we will invite him.
A. when B. whether C. how D. why
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A. from B. out of C. off D. down
It is generally believed that teaching is ____ it is a science.
A an art much as
B much an art as
C as an art much as
D as much an art as
In the second part of the passage, the author suggests banning on-the-job smoking so as to____.
A cut down costs of medical care and insurance
B create a healthy and safe working environment
C prevent eye irritation from becoming a big health problem
D improve the smoking employees’ work efficiency
A. while B. which C. whenever D. when