单项选择题

By the time of 1969, there were many space explorations.()

A．have been
B．must be
C．had been
D．must have been

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单项选择题

Whenever we hear of a natural disaster, we feel sympathetic to the people to be affected.()

A．to have affected
B．to have effected
C．who have been effected
D．who have been affected

单项选择题

Japan and the newly industrialized countries are passing labor-intensive sects as garment-making over to less developed nations and moving into advanced technology and services.()

A．sects like
B．sectors like
C．sections as
D．sections such as

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