We believe that lightning is a downward notion because ________.
A. we were taught so by our parents from our childhood
B. we are deceived by our sense of vision
C. it is a common natural phenomenon
D. it is a truth proved by science
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This programme will examine the writer’s books in detail, ________ an introduction
A. following
B. having followed
C. being followed
D. to be followed
In Britain people drive ________ the left.
A. at
B. on
C. to
D. in
None of the servants were ________ when Mr. Smith wanted to send a message.
A. allowable
B. approachable
C. available
D. applicable
A) sleepingB) workingC) eatingD) talking
A. sleeping
B. working
C. eating
D. talking
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