Many strange new means of transport have been developed in our century, the strangest of _______ being perhaps the hovercraft(气垫船).
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A
which
B
them
C
that
D
it
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The children went home from the grammar school,their lessons ________ for the day.
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A
finishing
B
finished
C
had finished
D
were finished
John told me he’d like to go hiking with me, his voice        joy.
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A
was heavy with
B
was full of
C
heavy with
D
full with.
There are many kinds of metals, ______.
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A
each having its special properties
B
having its special properties
C
one has its special properties
D
each has its special properties