单项选择题
A. passed B. gave C. took over D. handed over
During working time, everybody has to（）(注意)their’s own ...
单项选择题During working time, everybody has to（）(注意)their’s own and other people’s safety.
A. take care of B. take over C. look after D. look for
There is signal light on the （）(桅杆).A.mastB.masterC.mus...
单项选择题There is signal light on the （）(桅杆).
A.mast B.master C.must D.derrick
There are some （）(贯穿螺栓) in the toolbox.A. through bolts...
单项选择题There are some （）(贯穿螺栓) in the toolbox.
A. through bolts B. nuts C. bolts D. split pins
