单项选择题
It’s no good（）down by head.
A.to sail B.sails C.Sailing vessel D.sailed
单项选择题 It’s not advisable to cut（）the power supply.
单项选择题 It’s raining now. The dockers（）stay inside.
单项选择题 I’ve already made arrangements（）the tung-oil under S/0 No.70.
