1.

1)    Because

2

1)    advise sb. (not ) to do sth. 

2)    ask sb. (not ) to do sth

3)    invite sb. to do sth 

4)    order sb. (not ) to do sth

5)    tell  sb. (not ) to do sth

6)    warn sb. (not ) to do sth

7)    to close the windows

8)    not to run

 8B Unit One

1

1)    until 2) not until 

2

1) alone  lonely

1

4)①never ②yet ③for ④since

5)

① has turned ②come back yet ③have known ④ Has gone to ⑤been to

 8B Unit Two

1

1)    will write  as soon as 2) as soon as she gets home

2

1)    excited exciting 2) even though

3

1) talking 2) to have a rest

1

1)    were talking about  2) were doing  3) Were reading

2

1)    when  2) while

3

1) so  that  2) so difficult that 3) so slowly that

 8B Unit Three

1

1)    called 2) called Max 3) a place called

2

1)    arrived  2) gets to school 3) have reached

3

1) by  2) by 3) by 4) by

2

①The machine was made last year.

②The play isn’t written by the writer.

8B Unit Four

1

1)    our duty 2) not easy  to make model planes

2

1)    to close  2) showing

3

1) it will rain  2) to be happy 

1

1)    because of  2) because

2

1)    so 2) so

3

1)①hope ②wish  2)①hope to ②hope that

8B  Unit Five

1

1)    Why not 2) Shall meet 3) Let’s4)going boating

2

1)    teaches how to 2) teaching to swim teaching myself

3

1)    ①so that ②too to③old enough to

2)    ①so tall that ②tall enough

1

1)    they 2) is

2

1) used to work  2) are used to operating 3) are used to

8B  Unit Six

1

1)    I have come.

2)    I have been here for ten minutes.

3)    I bought this book last year

4)    They have had the magazines for a week.

5)    Susan’s grandpa died two years ago.

6)    Susan’s grandpa has been dead for two years.

2

1)    used to 2) is used to 3) are used to  4) was used by

1

1)    It is necessary to drink enough water.

2)    It is hard for the blind to do shopping in the supermarket.

3)    It is useful to listen to news every day.

4)    It is not possible for most students to go to bed early.

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