I used to go camping a lot so it isn’t the first time I in a tent.A. have sleptB. had sle

问题补充：

I used to go camping a lot, so it isn’t the first time I in a tent.

A. have slept

B. had slept

C. was sleeping

D. slept

答案：

(答案→)A. have slept

B. had slept

C. was sleeping

D. slept

解析：

试题分析;考查固定句型中的时态。固定句型：It/This is/was the 序数词 time that sb 现在完成时/过去完成时；如果前面是is，后面使用现在完成时，如果前面是was, 后面使用过去完成时。句意：我过去常常宿营。所以这不是我第一次在帐篷里睡觉。根据前面的is，说明后面使用现在完成时。故A正确。