— I phoned you at 7 yesterday evening but nobody answered.— Oh, I _______my dog in the park then.
In the old days, some wealthy people killed animals just for the ______ of it.
Xiao Li was about to cheat in the exam ________ the teacher came up, smiling to him.
You can find me easily, for there is only one house _______ roof is flat.
I shall never forget the days ______ I stayed in Africa, ________ has brought me a lot of advantages.
Never before in my life ________such a beautiful girl with so many high qualities.