相邻含水层之间水头差（）、弱透水层厚度（）、垂向透水性（），则单位面积越流量便（）。
参考答案：愈大；愈小；愈好；愈大
— How many months in a year? — There are .[ ]
A. twelve
B. seven
C. twenty-four
Mrs Black doesn't know if her American friend _____ to Heilongjiang. If he _____ here, she will meet him at
the airport. [ ]
A. will come; comes
B. will come; will come
C. comes; will come
