单项选择题
The （）is loose. Lend me a screw driver, please.
A.nut B.bridge C.engine room D.deck
单项选择题 When you want to saw metal, （）will be used.
单项选择题 We can use （）to cut wire.
单项选择题 - May I borrow you a screwdriver? - Yes. （）.
