单项选择题

A．It monitors the signals transmitted from the driver’s brain.
B．It can measure the driver’s alcohol level in the blood.
C．It can quicken the driver’s response to emergencies.
D．It bases its analysis on the driver’s heartbeat.
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单项选择题
A．Watches were of higher quality than ever before. B．More clocks were manufactured than watches. C．The availability of watches increased. D．Watches became less important because factories had clocks.
A．Watches were of higher quality than ever before.
B．More clocks were manufactured than watches.
C．The availability of watches increased.
D．Watches became less important because factories had clocks.
单项选择题
A．Play in a band. B．Work at the auction. C．Serve refreshments. D．Collect tickets.
A．Play in a band.
B．Work at the auction.
C．Serve refreshments.
D．Collect tickets.
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