下井必须携带和佩带的物品是()。
A.矿灯
B.自救器
C.矿工帽
D.工具
参考答案:A, B, C
The excellent service of the waiters __________highly praised.
That’s why the restaurant is always full of people.
A.were
B.are
C.was
D.is
詹姆斯.斯图尔特.布莱克顿[英]