Sandwich was a British man．He lived in the 18th century．Sandwich was rich，but heliked to play cards for money．He often played for 24 hours，and didn't even stop to have hismeals．He ordered(命令) his servants(仆人) to bring him some meat and bread．He put themeat between the two pieces of bread and held the food in his left hand while he played cardswith his right hand．People liked Sandwich's idea，and from then on they ate bread and meatas Sandwich did．From the name of the man，Sandwich，we have the word of the food sandwichtoday．
(1)
Sandwich was the name of a _____．
A．servant B．rich man C．poor man
[ ]
(2)
Sandwich _____．
A．was so interested in playing cards that he often had no time to have his meals
B．often brought some bread with him to play cards
C．never ate anything when he played cards
[ ]
(3)
People liked Sandwich's idea because _____．
A．bread，together with meat was cheap
B．he always won when he played cards
C．when they ate with one of their hands they could do something with the other
If a man in a spaceship looked down at the Earth, he would see mainly water．He might think that the Earth was one giant ocean with little land．
Nearly seven-tenths of the Earth's surface is covered by water．One ocean, the Pacific(太平洋), has an area of 63 million square miles．
Many years ago people thought that the land under all this water was flat．Now they know that this is not true．There are as many mountains under the sea sa there are on the land．
At first, there was very little salt in the sea．The salt was brought into the sea by rivers．It is possible to measure the age of the earth by measuring the amount of salt in the sea．Scientists can calculate how many years it took for this amount of salt to be carried from the land into the sea．
(1)
Nearly ________ of the Earth's surface is covered by water．
[ ]
A．
seven-tenths
B．
three-tenths
C．
seven-tenth
D．
three-tenth
(2)
Long time ago people thought that the land under the sea was ________．
[ ]
A．
mountains
B．
a ball of gas
C．
full of coal
D．
flat
(3)
In fact, under the sea the land ________．
[ ]
A．
is full of mountains
B．
is almost flat
C．
is full of coal
D．
is a ball of gas
(4)
At first, there was ________．
[ ]
A．
a little salt in the sea
B．
much salt in the sea
C．
little salt in the sea
D．
no salt in the sea
(5)
We can know the age of the Earth by measuring ________．
