Mr. Smith works as a government official now, but he ______ in a middle school for 5 years.
28. Let’s ______my scientific knowledge and your business skills and start a company.
27. He gave in to ______and opened the letter addressed to his sister.
26. The day we looked forward to______ at last.
25. The company was named Gates Hall ______ a man named James Gates.
24. —Who______ it be that is knocking at the door? —It ______ be father, but I’m not sure.