对吊钩和吊环的连接部分要经常检查、连接是否可靠，并应保持良好的（）。
参考答案：润滑
—Do you have enough to _____all your daily expenses?
----Oh yes , enough and spare.
A．cover
B．spend
C．fill
D．offer
You’d better not leave the medicine ____ kids can get at it.
A. even if B, which C, where D. so that
