1.—Where is Peter？I can’t find him anywhere.
—He went to the library after breakfast and________________(write) his essay there ever since.
2.Marty________________(work) really hard on his book and he thinks he’ll have finished it by Friday.
3.As you go through this book, you____________(find) that each of the millions of people who lived through World War Ⅱ had a different experience.
4.Jane can’t attend the meeting at 3 o’clock this afternoon because she________________(teach) a class at that time.
