I didn’t quite follow him because he explained the theory _____that is too abstract for me.
— I'll meet you outside the cinema in an hour, OK? — ____.
— Wasn't it Dr Wang who spoke to you just now? — ____.
— I wonder if I could use your mobile phone. — ____.
— Goodbye! I'm glad ____ you. — ____, too.
— Why didn't you go to the cinema yesterday? — I ____, but my wife returned from France the moment I was leaving.