A.helps
B.provides



helps
C.documents
D.laughs

A.established
B.worked
C.stretched
D.invented



stretched

Which of the following is the best title of the passage?
A.Earl Tupper’s story
B.A new sales method: The Home Party
C.Success application of a new marketing strategy
D.The Home Party: its invention and disappearance

The word “which” in line 3 of the first paragraph refers to______
A.three depressions
B.the lake
C.the rocky basin
D.the total water volume

All of the following is true about Lake Baikal EXCEPT that______
A.it is near the sea
B.it has the biggest amount of freshwater in the world
C.It is about 25 million years old
D.it has a great variety of fish

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