单项选择题

A．It increases the cost of car production.
B．Carmakers are not sure if it is useful.
C．The research on it is still being carried out.
D．People still have their doubts.
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单项选择题
A．Spanish conversation.B．Car maintenance.C．Pottery.D．Keep-fit.
A．Spanish conversation.
B．Car maintenance.
C．Pottery.
D．Keep-fit.
单项选择题
A．They think it useful.B．They think it valueless.C．They think it a waste of time.D．They think it misleads the students.
A．They think it useful.
B．They think it valueless.
C．They think it a waste of time.
D．They think it misleads the students.
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