How long do you think ______ will take to complete the sports center？

The price system is a complex network composed ofthe prices of all the products bought and sold in the economy as well as ofa great number of services.

―Are you disappointed with the result of the experiment?―No. ______, I’m pleased with it.

Jack, please don’t look out of the window. – ．

You’d better write down the name of the restaurant for further _______.