23. Our cat and dog will be took care of by our next-door neighbor. 

   You have always too much _____ about.
A. to talking  B. talk  C. talking  D. to talk

Exercise 4: Find the error in these sentences.

6. Will all the new students made to learn a second language?

7. He wasn't allowed leaving the premises. 8. The government department should have sent all the necessary forms.

9. The toddler dislikes to be forced to eat breakfast.

10. Peter believed he has left his wallet in his jacket pocket.

11. Don't let the gloomy weather depressed you.

12. I just don't like people to stare at me.

Bài Này phải tự tìm lỗi sai rồi tự sửa ạ 

Read the passage below carefully, and then choose the best answer:

Background, in relation to computers, on the screen, the color on which characters are displayed. (1) _______, a white background may be used for black characters. In a windowing environment in which more than one program or document can be available to the user, open but currently inactive (2) _______ are said to be in the background.

In the context of operating systems and program execution, background refers to a process, or task, assigned a lower priority in the microprocessor's share of time to tasks other than the task running in the (3) _______. A background process thus often performs its work, such as printing or checking for arriving messages on an electronic mail network, invisibly unless the user requests an update or brings the task to the foreground. (4) _______, only multitasking operating systems are able to support background processing. However, some operating systems that do not support multitasking may be able to perform one or more types of background tasks. For example, in the Apple Macintosh operating system running in Single-Launch Mode (with multitasking (5) _______), the Background Printing option can be used to print documents while the user is doing other work.

Câu 2:
A. windows
B. systems
C. tasks
D. characters