All workers should carry out their normal duties during the safety in-考呗网

单选题 All workers should carry out their normal duties during the safety inspection tomor-row __________ otherwise instructed.

A．through
B．unless
C．despite
D．about

【答案】B。解析：句子表示“如果没有收到其他的指示”，因此连词B意为“如果不……”为正确的答案。

1Passengers can__________the amount of light they receive by using the black switch lo-cated on their overhead panel.

A．supervise
B．control
C．exchange
D．trade

2 __________ fully staffed, the office will have to accommodate the workspace and equip-ment needs of over sixty workers.

A．When
B．In
C．Though
D．With

3 The two sides did not reach an agreement __________the end of the fifth round of the in-tense negotiations.

A．still
B．from
C．when
D．until