The passage mainly discusses _____.
A.adult differences in learning a foreign language
B.children’s ability to learn a language
C.the age factor in learning languages fast
D.research into language acquisition

Where in the passage does the author mention that children acquire their own language easily?
A.lines 1-2 
B.lines 7-10 
C.lines 14-16 
D.lines 17-18

According to the passage, what was the purpose of examining a sample number of immigrants?                                                                                                   .
A.To compare different age groups
B.To detect differences in nationalities
C.To confirm different language characteristics
D.To measure the use of grammar

The word “who” in the third paragraph refers to ____.
A.Elisa Newport
B.Koreans
C.students
D.colleagues

In the experiment in the passage, the psychologists discovered that ____.
A.most students have lived in the U.S for more than 10 years
B.older students were unable to learn English 
C.young students learned English best
D.students who arrived late were worst of all

The word "unrelated” in the third paragraph is closet in meaning to ____     .
A.unfamiliar
B.unclassified 
C.unidentified 
D.unconnected

The word “set ” in the second paragraph could best be replaced by ____  .
A.fixed
B.changed
C.stable
D.formed

According to the passage, young children learn languages quickly for all of the following reasons EXCEPT ____.
A.they make many mistakes
B.they want to talk
C.their approach is flexible   
D.they frequently repeat words

The word “cap” in the first paragraph is closet in meaning  to _____.
A.prize 
B.limit
C.covering
D.level

From the passage, it can be inferred that “phonology" is the study of ____.
A.the grammar of a language
B.the rules of a language
C.the vocabulary of a language
D.the sound system of a language