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第1题

The company ________ a working prototype in September at its annual Technology Innovation Conference in Beijing.
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第2题

This candidate _________ Spanish for six years by the time he takes his examination.

A、has been studying
B、w
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第3题

When an element is caused to ________ with oxygen it is oxidized.

A、compare
B、compose
C、combine
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第4题

These platforms are going to get cheaper while becoming more capable and more ________.

A、compass
B、compact<
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