—Was it in April, 1970 that China ________ sending its first satellite into space?—Yes, that's right.
It was so cold that they kept the fire ________all night.
Believe it or not, he was seen ______upstairs just now.
They knew her very well. They had seen her ____up from childhood.
Mrs. Smith warned her husband _____after drinking again and again.
The first textbooks _____for teaching English as a foreign language came out in the 16th century.