People believe that 13 is an unlucky number.
A.It was believed that 13 is an unlucky number.
B.That 13 is an unlucky number is believed.
C.13 is believed an unlucky number.
D.It is believed that 13 is an unlucky number.

There won't be any rain tomorrow.
A.It won't rain tomorrow.
B.There won't be no rain tomorrow.
C.There won't be raining tomorrow.
D.There won't be rains tomorrow.

A.pays
B.stays
C.says
D.plays

A.machine
B.washing
C.brush
D.chin

A.theme
B.there
C.thin
D.thank

Which sentence is true?
A.American English has no dialects.
B.American English has dialects.
C.There is no study on American speech habits.
D.American English has no exception.

The study has shown that ______.
A.different words are used in different parts to denote the same thing
B.different words are used in different parts to denote a different thing
C.there are no different words in different parts
D.dialects do not exist in American English

Differences in speech can lead to ______.

A.dialects
B.changes
C.new concepts
D.misunderstanding

Language ______.
A.frequently changes
B.is the same in almost every part
C.makes misunderstanding happen
D.makes people change

An eyewitness described how ten people (kill).............. in the fire.
A.have been killed
B.had been killed
C.killed
D.should kill