His brain was just anyone’s with so rich experiences

Was it in April, 1970 that China ________ sending its first satellite into space?—Yes, that’s right.

It’s dangerous to walk across the street carelessly.— You’re right. We can’t be careful while crossing the street.

With the stress heavier, physicians arealways ______ caution upon citizens in view of heart attack.

Wang Gang is considering buying a computer, is considered to be a great help in our work and study.