单项选择题

A．The high temperatures required for its use.
B．The lack of trained environmental engineers.
C．The opposition of automobile manufacturers.
D．The high cost of materials used in its production.
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单项选择题
A．Pay for the woman’s football ticket.B．Find out how many points were scored.C．Wait until next month to see a game.D．See the game in person.
A．Pay for the woman’s football ticket.
B．Find out how many points were scored.
C．Wait until next month to see a game.
D．See the game in person.
单项选择题
A．He didn’t work hard in school.B．He took a part-time job in school.C．He had always been serious about study.D．He had no interest in social work.
A．He didn’t work hard in school.
B．He took a part-time job in school.
C．He had always been serious about study.
D．He had no interest in social work.
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