In a post office.
On board a ship.
In a booking office.
On an airplane.
第1题:
About every four minutes.
About every five minutes.
About every six minutes.
About every seven minutes.
第2题:
第3题:
people living in the country
non-government officials
people with insurance
the poor and the old
第4题:
changeable
expensive
reasonable
fixed
第5题:
第6题:
第7题:
第8题:
第9题:
Traveling in Space
Sleeping in the Spacecraft.
Equipment Used by Astronauts.
The Earth Seen from Outer Space.
第10题: