Scientists are particularly interested in lake Baikal because_____
A.its ecosystem is special
B.it has more species of plants than anywhere else
C.the animals there are similar to elsewhere
D.it is isolated

Omu is mentioned in the passage as
A.descendents of ocean-dwelling seals
B.an animal migrating inland from the sea
C.an animal unique to the lake
D.a local fisherman

According to the passage, there are ____factors contributing to the clarity of the water in Lake Baikal.
A.1
B.2
C.3
D.4

The word “cloud” in the final paragraph can be best replaced by_______
A.cold
B.muddy
C.clean
D.dirty

The water in the lake is from all of the following EXCEPT____
A.rainwater
B.snow
C.streams
D.forests

WRITING
They spent a lot of money on food and clothes.
A.A lot of money was spent on food and clothes.
B.A lot of money were spent on food and clothes.
C.A lot of money on food and clothes were spent.
D.Money was spent a lot on food and clothes.

WRITING
The thieves wore gloves so as to avoid leaving any fingerprints.
A.The thieves wore gloves so as to not leave any fingerprints.
B.The thieves wore gloves so that not leave any fingerprints.
C.The thieves wore gloves in order not to leave any fingerprints.
D.The thieves wore gloves in order to not leave any fingerprints.

WRITING
The coffee was too hot for me to drink.
A.The coffee is so hot that I can’t drink it.
B.The coffee is so hot that I can’t drink.



The coffee was so hot that I couldn’t drink.
C.The coffee was so hot that I couldn’t drink.
D.The coffee was so hot that I couldn’t drink

Nobody knows why she left so suddenly without saying a word,……….?
A.Isn’t it
B.Does he



Isn’t it
C.Don’t they



Does he
D.Do they

The woman asked………………… get lunch at school.
A.can the children
B.whether the children could
C.If the children can
D.could the children