单项选择题

The sky was so clear in fact that the communications crew and recovery team could watch the balloon______ to its maximum altitude with the naked eye.

A．hike
B．elevate
C．escalate
D．ascend
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单项选择题
As the trial progressed, and the evidence mounted up, it became______ difficult to take the plea seriously.
A．presumably
B．increasingly
C．absolutely
D．invariably
单项选择题
The local people were joyfully surprised to find the price of vegetables no longer according to the weather.
A．altered
B．converted
C．fluctuated
D．vibrated
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