单项选择题

Like any other (constant) repeated action, speaking (has to) be learned, but once it (is learned),it becomes a generally (unconscious) and apparently automatic process.

A．constant
B．has to
C．is learned
D．unconscious
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单项选择题
It is (raining hard) outside. (Haven' t) you (taken) an umbrella (with you)
A．raining hard
B．Haven' t
C．taken
D．with you
单项选择题
If he (was to come) here this afternoon, I (should ask) him to go to the party (held by) student (union).
A．was to come
B．should ask
C．held by
D．union
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