单项选择题
A.near B.on C.alongside D.in
Hold （）the breast line.A.onB.atC.inD.to
单项选择题Hold （）the breast line.
A.on B.at C.in D.to
Sailors should do mooring work when （） harbour.A.enter...
单项选择题Sailors should do mooring work when （） harbour.
A.entering B.enter C.toenter D.entered
Shall I put the spring on this （）?A.bitB.bittC.bitingD....
单项选择题Shall I put the spring on this （）?
A.bit B.bitt C.biting D.bite
