4 各文の()内のうち、適当なほうを選びなさい。
(1) The game (has already started/ had already started) when we got to the
stadium.
(2) I (have never traveled / had never traveled) abroad before that time.
(3) The rain (has just stopped/ had just stopped). Let's go out now.
(4) Ken was angry because he (has been waiting/ had been waiting) for her for
two hours.
(5) Aya didn't have her jacket. She (has left, had left) it on the train.
動詞は適当な形に直すこと)