单项选择题

When television was first (introduced), the extent to (that) it would (affect) society could not (have been foreseen).

A. introduced
B. that
C. affect
D. have been foreseen
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单项选择题
(So great) (was) the influence of Thomas Paine (on) his own time that John Adams suggested that the era (was called) The Age of Paine .
A. So great
B. was
C. on
D. was called
单项选择题
(Annoying) at the long check-out lines, the shopper began (to sigh) loudly, tap his (foot), and (glance) at his watch.
A. Annoying
B. to sigh
C. foot
D. glance
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