单项选择题
The first coat to a bare metal surface is the ()(底漆).
A.undercoat B.primer C.topcoat D.thinner
单项选择题 The nut is loose. Lend me a ()(螺丝刀) , please.
单项选择题 Pull out the ()(钉子) with a claw hammer.
单项选择题 Please lend me two ()(羊角锤).