改错

1.My English is so limited that I have to keep on learning some expressions and use them.________________________________________________________

2.Don't be angry with me because not having replied to your letter.

______________________________________________________________

3.The difficulty faces us today is the supply of food to those in need.

_____________________________________________________________

4.Much experience are needed to operate a computer well.

_____________________________________________________________

5.We are now living in the room whose windows face the south.

_____________________________________________________________

6.The managers discussed the plan that they would like to see it carried out the next year.________________________________________________________

7.It has been announced, we shall have our final exam this month.

____________________________________________________________

8.She thought I was talking about her daughter, which, in fact, I was talking about my daughter.______________________________________________

9.The clouds moved across the moon, left us in total darkness.

______________________________________________________________

10.They looked up and saw a notice on the wall read:"No smoking!"

_____________________________________________________________

11.They bought a new house but which will need a lot of work before they can move in.

_____________________________________________________________

12.We can learn a lot of about what a person is thinking by watching his  or her body language.________________________________________________

13.I was still so angry that I went up to tell him how I thought of him.

____________________________________________________________

14.It never occurred me to phone you.

_____________________________________________________________

15.I was prevented by illness taking the exam.

_____________________________________________________________