气门上温度最高的地方是（）。
A.气门脚
B.气门杆
C.气门颈
D.气门头
参考答案：D
营业成本
— Let's go on a camp if it _____ this weekend, Jimmy!
— But nobody knows if it _____.[ ]
A. is fine; rain
B. will be fine; rains
C. will be fine; will rain
D. is fine; will rain
