How come you stepped into the lab with your shoes on? You’re ________to take them off before you enter it. I told you so.

After spending a wonderful weekend, Jim would have to return to his   ________    duties on Monday.

—I’ve got a new English teacher, Lucy Mere.—Lucy Mere? She happens       me before. She is patient.

We will do what we can to get the goods _________ on time.

The first time I saw him, what impressed me most were his waistline _____ nearly 3 Chinese chi and his obesity ______ 210 jin.