单项选择题

What is the size of the piece of Telstar X expected to strike the earth

A．Several ounces.
B．Large enough to kill the dinosaurs.
C．Large as a house.
D．More than one kilogram.
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单项选择题
The spokesman for the US delegation described the first day of talks as______.
A．Instructive.
B．Constructive.
C．Productive.
D．Permissive
单项选择题
The talks______.
A．would last for a week
B．will have to give China a chance to speak
C．is a pre-meeting before this month's summit
D．have reached a disagreement
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