单项选择题

______make good progress.

A．Only by working hard they can
B．By only working hard they can
C．Only by working hard can they
D．Only they can by working hard
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单项选择题
Why do people buy things without seeing them in person
A．To enjoy themselves.
B．To save money and trouble.
C．To get more than they need.
D．To look for something new.
单项选择题
What does the word They in They can probably pay a certain part of the full price... refer to
A．People.
B．Shops.
C．Goods.
D．Catalogue.
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