IV. Mistake correction:
My brother can’t walk to work now because his broken leg.
A.can’t
B.to
C.because
D.broken

IV. Mistake correction:
There are many reasons why a particular species may become endanger.
A.why
B.species
C.may
D.endanger

IV. Mistake correction:
Don’t worry! The train will be arrived soon.
A.Don’t
B.worry
C.The
D.be arrived

______ (6. organize)
A.organizational
B.organizing
C.organization
D.organizer

III. Choose the best option to complete the following sentences:
His lecture was interesting but too much to __________ all at once.
A.digest
B.process
C.chew
D.convert

III. Choose the best option to complete the following sentences:
1900 water polo has been in the program of the Olympic Games.
A.For
B.In
C.Since
D.By

III. Choose the best option to complete the following sentences:
Taking soup is easy and fast; just put it in your mouth and .
A.chew
B.swallow
C.taste
D.digest

III. Choose the best option to complete the following sentences:
During the last few decades, human beings have done a great to the environment.
A.pollution
B.impact
C.damage
D.danger

III. Choose the best option to complete the following sentences:
The director at the airport.
A.must meet
B.must to be met
C.have to be meet
D.must be met

III. Choose the best option to complete the following sentences:
Maria: "Thanks for the lovely evening."
- Diana: "____________________."A.No, it's not good
B.I'm glad you enjoyed it
C.Yes, it's really great
D.Oh, that's right