Please come to my house whenever you are______.

How does John usually go to school — He ________ ride a bike, but now he ________ there.

Boys and girls, you ____ talk in class, or you will miss something important.

My father kept on although he was tired.

rst Chinese lunar roving vehicle Yutu landed on ______ the Chinese thought was where a beautiful fairChang’e lived, the moon, on December 14, 2013