单项选择题
We sailors must take care of all of the cargo handling gears and parts.()
A.水手必须修理所有的装卸货设备。 B.我们水手必须照管所有的货物和零部件。 C.我们水手必须保养所有的装卸货设备和零部件。 D.我们水手必须修理所有的装卸货设备和零部件。
单项选择题 We use the chipping hammer to chip the heavy rust.()
单项选择题 In this way, we can remove all salt, dirt and oil stains.()
单项选择题 Before painting, we must clean and wash the painted parts with the cleaning solution. ()