单项选择题

They concentrated their efforts on ______ products of high quality.

A．turning on
B．turning off
C．turning out
D．turning over
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单项选择题
Why do many parents send their children to the boarding school in Canada
A．They want to spend more money in the children’s education.
B．They want to spend less money in the children’s education.
C．They want to have their own time to enjoy life.
D．They want to make their children become more competitive in the future.
单项选择题
Which of the following statement is true
A．The programming offered by the boarding school is very strict.
B．The programming offered by the boarding school is very rich.
C．The programming offered by the public system is mom colorful.
D．The programming offered by the public system is more effective.
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