单项选择题
0perational tests of ship’s equipment should（）out.
A.be carried B.carry C.carrying D.to carry
单项选择题 0ur bosun is（）lookout on the forecastle now.
单项选择题 0ur engine has a（）of 10000 horse-power.
单项选择题 0ur jumbo boom（）out of use for a long time.
