单项选择题
If the freeboard is less than 9 meters, we should rig（）.
A. a gangway B. a pilot ladder C. rope ladder D. gangway combined with pilot ladder
单项选择题 It is （）higher.
单项选择题 The pilot is taking my ship（） the harbour now.
单项选择题 On which side do you want the ladder （）?
