单项选择题
A.so B.that C.this D.same
There is a VHF set（）the front of the wheelhouse.A.atB.o...
单项选择题There is a VHF set（）the front of the wheelhouse.
A.at B.on C.of D.in
There is a drifting mine（）in position 21 degrees 31 min...
单项选择题There is a drifting mine（）in position 21 degrees 31 minutes North 124 degrees 20 minutes East.
A.report B.reports C.reported D.reporting
There is a（）mine in position 50°N，30°W.A.driftingB.drif...
单项选择题There is a（）mine in position 50°N，30°W.
A.drifting B.drifted C.drift D.draft
