the people _7_ did not know how to write
A. when and where
B. of when and where
C. that time and place
D. of that time and place
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_17_ the professor stopped
At first
B. At last
C. At once
D. At least
When he (9) up
A. gave
B. sat
C. woke
D. got
began to swing _16_ slowly for him
A. enough
B. more
C. too
D. less
we (2)what it will be like
A. imagine
B. know
C. feel
D. guess