Mum， I feel lonely because I don't have anybody to play with． May I keep a dog？

____________We aren't supposed to keep any pets in the tall building．（　　）

There is a mistake in your sentence．

Oh， I see． I've dropped _____________"u" in the word "usually"．（　　）

Cindy， it's very nice _____________you to lend me your car． It helps me a lot．

It's my pleasure．（　　）

Her parents_____________ doctors． They_____________ in a hospital nearby．（　　）

Why didn't Lucy come to your birthday party last night？

She said that she had a headache， but that was only a（n）_____________． I saw her playing on the playground just now．（　　）