单项选择题
Sometimes, it is necessary for （）to mix the paint.
A. chief officer B. bosun C. captain D. second officer
单项选择题 Remember that gloomy, damp and rainy days are not suitable for （）.
单项选择题 Put on your chipping （）when chipping and scraping.
单项选择题 The sailor working aloft should wear （）.
