performance guarantee（performance bond、performance security)

Why do companies use a corporate travel agency？

A．It saves them valuable time.

B．It guarantees service standards.

C．It offers the best available prices.

HPLC(high performance liguid chromatography)。

Political______sometimes looks like the performance on the stage.

A．act

B．action

C．actor

D．actress

Not all details of the microchip's performance are ______.

A．available

B．adequate

C．sufficient

D．approachable

The distinction between competence and performance is proposed by ______.

A．Saussure

B．Halliday

C．Chomsky

D．the Prague School

A.performance

B.rehearsal

C.show

D.distribution

Why must the audience remain seated？

A．The performance is being monitored.

B．The performance is being broadcast.

C．The performance is being videotaped.

D．The actors can be disturbed.