It was not until midnight ______ the parents finally found their lost kids. [ ]

Mr Smith _____the grammar book meant for senior high school students and will almost finish it.[ ]

My name is Alan Green .You can call me________

What do you think I should do?——I think you’d better pay a visit to him____.

_______ his scientific work, he has no time to care for his family affairs, _______, of course, his wife always complains about.