单项选择题

What is a coronary bypass

A．An operation to bypass the heart.
B．An operation to replace a disabled artery with another artery.
C．An operation to construct a passage around a blocked artery.
D．An operation to take care of faulty heart action.

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单项选择题

A．To help people understand the play.B．To explain the grant.C．To get financial support for the series. D) To introduce the actors.

A．To help people understand the play.
B．To explain the grant.
C．To get financial support for the series. D) To introduce the actors.

单项选择题

A．On Friday.B．In two weeks.C．At 7 P.M..D．Right after the library talk.

A．On Friday.
B．In two weeks.
C．At 7 P.M..
D．Right after the library talk.