Exercise 3. Choose the word or phrase to best complete the sentence.
In geometry, a tangent is a straight line ..... a curve at only one point.
A.it touches 
B.whose touching
C.its touching  
D.that touches

These snakes will not cause you any serious harm even if they bite you.  They are............
A.poisonous
B.cruel
C.harmful
D.harmless

Exercise 4. Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best first each of the numbered blanks from 16 to 20.
Nowadays people are more aware that wildlife all over the world is in (16)______ . Many species of animals are threatened, and could easily become (17)_______ if we do not make an effort to protect them. In some cases, animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught (18)______  and sold as pets. For many animals and birds the problem is that their habitat - the place where they live - is disappearing. More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them to grow better crops, but these chemicals pollute the environment and (19)______  wildlife. The most successful animals on earth - human beings - will soon be the only ones (20)______, unless we can solve this problem.
(19)
A.spoil
B.wound
C.wrong
D.harm

Most people consider it women's responsible to take care of children and do housework.
A.Most                       
B.of                         
C.responsible               
D.do

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
He didn’t know              or stay until the end of the festival.
A.if to go     
B.if that he should go
C.to go    
D.whether to go

__________(7)
A.though  
B.but  
C.because  
D.so

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
He did not remember the meeting. He went out for a coffee with his friends then.
A.Not remembered the meeting, he went out for a coffee with his friends.
B.Not to remember the meeting, he went out for a coffee with his friends.
C.Not remember the meeting, he went out for a coffee with his friends.
D.Not remembering the meeting, he went out for a coffee with his friends.

 it / important / brother / stop / smoke / once.
A.It is important that your brother should stop to smoke at once.
B.It is important that your brother should stop smoking at once.
C.It is important that your brother should stop to be smoking at once.
D.It is important for your brother should stop smoking at once.

We arrived too late to see the first film.
We didn't................................................................................
A.
B.
C.
D.

The word “proclaimed ” in the passage is closest in meaning to__________ .  
A. thought   
B.heard
C.remembered 
D.announced