单项选择题

The sun is very large in comparison with its nine ______ planets which, in turn, are circled by a total of thirty-three satellite.

A．surrounding
B．cycling
C．orbiting
D．whirling
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单项选择题
Some researchers have undertaken some psychological studies which prove that many children develop fears of ______ dangers.
A．imagination
B．imaginary
C．imaginable
D．imaginative
单项选择题
The waltz and the tango seem to be out of fashion today. Things like the twist and jerk seem to be ______ young people are really interested in.
A．all that about
B．about that all
C．about all that
D．all about that
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