单项选择题
A.what B.how C.where
Spread a safety net（）the gangway.A.onB.overC.byD.under
单项选择题Spread a safety net（）the gangway.
A.on B.over C.by D.under
I shall （）the security patrol.A.keptB.keepC.keepingD.ke...
单项选择题I shall （）the security patrol.
A.kept B.keep C.keeping D.keeps
Where is the captain? -（）.A. Follow meB. He’s in his ca...
Where is the captain? -（）.
A. Follow me B. He’s in his cabin C. Yes, he is D. No, he isn’t
