The wheel’s order “port five” means that the ship is going to ________
A. turn back
B. turn around
C. turn about
D. alter course
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The dockers are busy ________ their work
A. in
B. with
C. at
D. by
Vessels transiting the Canal must have their gangways and derricks ________
A. readjusted
B. removed
C. lowered
D. rigged in
An automobile sling is used for ________
A. lifting aircraft and helicopters
B. lifting any kinds of cargo
C. lifting the heavy boxes
D. lifting cars and trucks
Must we work on night shift today？ No, you ________
A. need
B. needn’t
C. mustn’t
D. shouldn’t
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