单项选择题

-- ______ do you play tennis? -- Twice a month.

A．When
B．What
C．How
D．How often

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单项选择题
Unless you work hard you ______ your test.
A．will pass
B．will not pass
C．would pass
D．would not pass
单项选择题
Please fill ______ this online application form.
A．up
B．on
C．out
D．with
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