用所给词的正确形式填空。 1.They _________ (spend) their holiday in London last summer. 2.Kitty studies by _________ (her). 3.It’s time _________ (have) lunch. Hurry up! 4.I am _________ (have) a good time in Changsha. 5.It _________ (take) me about two hours to finish my homework.