单项选择题

A．Microwaves are strange electric waves.
B．Microwaves travel in straight lines and do not follow the curve of the earth’s surface.
C．There are not any wires to send microwaves.
D．We must amplify microwaves in relay stations.
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单项选择题
A．Her professor did not like her story:B．She had trouble finishing her assignment.C．She did not like the topic she had chosen for her paper.D．She was taking too many courses.
A．Her professor did not like her story:
B．She had trouble finishing her assignment.
C．She did not like the topic she had chosen for her paper.
D．She was taking too many courses.
单项选择题
A．The players use a round ball in the game.B．The players cannot pass the ball with their hands.C．The game is a rugby game.D．The players use an elliptic ball in the game.
A．The players use a round ball in the game.
B．The players cannot pass the ball with their hands.
C．The game is a rugby game.
D．The players use an elliptic ball in the game.
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