Choose the best answer to complete the sentences.
He says he'll tell the authorities but it's just an empty ______.
A.A. threat
B.B. threaten
C.C. threatening
D.D. threateningly

Choose the best answer to complete the sentences.
Work on the production line is monotonous and lacks _______.
A.A. variety
B.B. various
C.C. varied
D.D. variable

Choose the best answer to complete the sentences.
The bridge is a marvelous work of engineering and _______.
A.A. destroy
B.B. destruction
C.C. destructive
D.D. destructively

Select the antonym of the following bold and underlined word in each sentence in the unit:
Man and most animals need a constant supply of water to live.
A.A. fitful
B.B. faithless
C.C. uncertain
D.D. weak

Select the synonym of the following bold and underlined word in each sentence in the unit:
The loss of much forest is destroying Earth’s plant and animal variety.
A.A. change
B.B. kind
C.C. type
D.D. collection

Choose the word whose main stress is placed differently from the others in each group:
A.A. vegetation
B.B. eliminate
C.C. disappearance
D.D. intonation

He left a message so that I could know where to find him.
A.He left a message, which I knew where to find.
B.I could know where to find him, so he left a message.
C.He left a message, because I knew where to find him.
D.I could know where to find him thanks to the message he left.

Choose the word whose underlined part has a different pronunciation from the others in each group:
A.A. pollute
B.B. develop
C.C. constant
D.D. provide

Flooding in this region was the result of heavy rain.
A.Flooding in this region was the cause of the heavy rain.
B.Heavy rain causes flooding in this region.
C.Heavy rain resulted in flooding in this region.
D.Because of flooding in this region, there was heavy rain.

I regret giving Dennis my phone number.
A.I should have given Dennis my phone number.
B.If only I had given Dennis my phone number.
C.If only I had not given Dennis my phone' number.
D.I wish I could give Dennis my phone number.