In the past ten years, there have been many changes in family life.— Are these changes ______?

Our town________poor in the past, but great changes________in the town in the past three years.[ ]

The poor old man lived alone and _________ a cold rainy morning.

__________ it is from our own planet Earth to Mars!—Yes, it takes months to travel to Mars by spacecraft.

A mysterious illness, referred to as “ a typical phenomena”, has been brought under control, the government said on Wednesday, ______ no cause of it has been made public