It was the first time she at a summer school and she really enjoyed itA. has been.B. was.

问题补充：

It was the first time she at a summer school and she really enjoyed it

A. has been.

B. was.

Chad been.

D. would be

答案：

A. has been.

B. was.

(答案→)C. had been.

D. would be

解析：考查固定句型的时态：句意：这是她第一次到暑假学校，她真的很喜欢它。这句话用了句型：It was the first time+从句的句型，从句中的谓语是过去完成时，如果是It is the first time+从句的句型，从句中的谓语是现在完成时，选C。