There we shall call at some ports（）and discharge some cargo.

单项选择题We shall（）some ports in Canada.

A.call at
B.call on
C.call in
D.call up

单项选择题Our ship（）loading yesterday morning.

A.finish
B.finishing
C.finished
D.has finished

单项选择题A notice has just（）the port administration.

A.came from
B.come from
C.come
D.came

单项选择题Our ship（）to her home port Yantai again.

A.has returned
B.have returned
C.has return
D.have return

单项选择题I（）major damage to navigational instruments.

A.has
B.had
C.have
D.have to