The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
When first to his new classmates, the little boy felt shy and said nothing.
. –Hi, Mary. Would you like to go to the concert this evening? --Sorry, Tom. Tomorrow’s lessons, I have no time to go out with you.
. –The maths exam is not difficult, is it? -- . Even Tom to the top students failed in it.
. with the children living in poor area, I have a happy childhood.
–Why are you so worried? --There are so many problems .