A.石油
B.天然气
C.柴薪
D.核能
答案:C
夜间或白天的值班经理必须做好不少于几次巡视()
A.4次
B.3次
C.2次
D.1次
____________ two exams to worry about, I have to work really hard this weekend.
A.As for
B.Besides
C.With
D.As