Mr. Li, I can’t understand everything in class.-Don’t worry, I’ll _______ the main points at the end.

What is the _______ between the two men—- They are colleague(同事). Their job is to collect _______ important information for the boss.

Do you often hear John ___ in hisroom –Yes Listen! Now we can hear him ___ in his room

Try not to work yourself too hard. Take it easy.— Thanks. __________

47. Three hundred firemen raced to thehotel after a smoke detector ______ the alarm soon after midnight.