In summer milk will quickly go bad_____ it is put into a fridge.
American First Lady Michelle Obama arrived ______ China _______the afternoon of March 20, 2014.
.---- The presidents of China and the USA had ___interview a short time ago. ---- And it was __great success.
— How much does it cost to built the school library?— Four yuan.
— Why hasn’t Mr. Li come to work yet? —Because he _______Guangzhou for a holiday.
— I’m a little tired. Let’s go to the zoo by taxi. —We ________take a taxi. It’s not far from here.