The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
—What do you think of my plan?—Sorry. What’s that? I_____ about something else.
—Who won the election for mayor?—A man to represent every minority group in the city.
______ at the news that his eyes rained tears.
—Has your former classmate come back from America?—Yes, he _____ there for 8 years.
—Hello, can I speak to Mr. Smith?—I’m sorry, but it is 3 weeks _____ he worked here.