矿井应当查清矿区及其附近地面水流系统的（）等情况。
A.汇水情况
B.渗漏情况
C.疏水能力
D.有关水利工程
参考答案：A, B, C, D
— David, keep ______ in mind that you have to be home by 10 o'clock.
— OK, Mom, I will.
A．it
B．me
C．this
D．one
The panda and the tiger _____ from China. [ ]
A. come
B. comes
C. live
D. lives
