The old couple used to take a walk after supper in the park with their dog _______ them.
In ______, the northerners are keen on dumplings while the southerners are fond of rice.
______ is obvious ______he has finished his work.
---Could I call you by the first name? ---Yes, you_______.
---Did you see the film last night? ---No, ________, but I was too busy.
Crazy English has over 20 million students all over China _____ the class through Internet.