After 4 years abroad, he returned home as an excellent engineer.
A.After he studied 4 years abroad, he returned home as an excellent engineer.
B.After he has studied for 4 years abroad, he returned home as an excellent engineer.
C.After he studied 4 years abroad, he returned home as an excellent engineer.
D.After he had studied for 4 years abroad, he returned home as an excellent engineer.

In spite of heavy rain, my brother went to work.
A.In spite it rained heavily, my brother went to work.
B.Although it rained heavily, my brother went to work.
C.Despite it rained heavily, my brother went to work.
D.Though rain was heavily, my brother went to work.

Our company holds the monopoly over the import of these chemicals..
A.Our company is one of the few companies allowed to import these chemicals
B.Ours is the only company allowed to import these chemicals.
C.All companies but ours are allowed to import these chemicals.
D.These exported chemicals are held by our company, which is monopoly

We run the business as a joint venture.
A.We run the business, which produce joint venture.
B.We were risky to run the business.
C.We run the business together.
D.We run a business just for a venture.

Abrams will stand trial murder at the High Court next week.
A.They will try Abrams for murder at High Court next week.
B.Abrams will try to find the murder at the High Court next week.
C.Abrams murdered, which made him try the High Court next week.
D.The High Court murdered Abrams, who will stand trial next week.

A.name
B.natural
C.native
D.nation

blood
A.blood
B.food
C.moon
D.pool

Methods of observation such as EEG recording and functional brain imaging tell us:
A.how individual cells give rise to complex operations is unknown.
B.the works of brain are highly organized.
C.single unit recording can resolve the activity of single neurons.
D.nothing.

The passage can be described as:
A.informative
B.complicating
C.romantic
D.thrilling

Try to learn the meaning of new words ............heart.
A.in
B.on
C.at
D.by