Life in cities is much livelier than ________ in the country.      

Excuse me, sir. I bought the shoes yesterday, but they are in different sizes. One is size 37, _____is size 38.

--Would you like this pair, or that pair? ---___ will do.

The Internet and the effect       brought about did a lot of good to our daily life and work. That is to say, the Internet has made a great difference in many aspects. 

His father insisted on punishing him, but he insisted he had _______ to do with the matter.