Indentity and correct the mistake in each sentence.

1.The police is now investigating the robbery that took place in our neighbourhood last night.

2.There was a slight disagreement between committee members of the club,regarding their trip next month.

3.When you talk to the old man,please speak out,he is hard of hearing.

4.Even with our current level of technology,we still do not have the power to respond with every human need.

5.The assignment for Monday is to read the chapter two in your textbook.

Cho tam giác ABC vuông tại A,AH là đường cao.

a)Cho AH=16,BH=25.Tính AB,AC,BC,CH.

b)Cho AB=12,BH=6.Tính AH,AC,BC,CH.

10. Dùng động từ trong ngoặc ở dạng dúng The world's first computer (1) ..........(build) at the University of Pennsylvania in 1946,although computer-like machines (2).........(build) in the 19th century.Computers(3)..........(sell)commercially for the first time in the 1950s, and progress (4)..........(make)since than.Computers are now much smaller and more powerful, and they can (5).........(buy)much more cheaply. Computers (6).........(use) in many fields - in business, science, medicine and education. They can (7).........(use) to forecast the weather or to control robots which make cars. The computer's memory is the where information (8).......... (keep) and calculations (9)..... (do). A computer can not think for place itself. It must (10) ..........(tell) exacly what to do.A lot of calculations can (11).........(do)very quickly on a computer Computer don't make mistakes. Stories (12) .........(hear) sometimes about computers paying people too much money or sending them bills for things they didn't by. These mistakes (13) .........(make)by the programmers. Some years ago, an American computer-controlled rocket went out of control and had(14)......... (destroy). The accident (15) .........(cause) by a small mistake in one line of the program,which cost the USA 18 million dollars. Criminals have found that "computer crimes" are a lot easier than robbing banks. Hundreds of millions of dollars (16)..........(steal)from bunesses every by people changing the information in computers. Large numbers of home computers (17).........(sell) recently. People know more about computers than they used to, and computers are playing a bigger part in our lives. Progress (18).......... .(make) all the time. Many people believe we can look forward to the day when even our household jobs like cleaning and decorating (19)........(do) by computer-controlled robots.

Hoàn thành câu dùng dạng đúng của động từ Have(ý nghĩa bị động)

1.He.........(fit burglar alarm) since his house was broken into.

2.They.........(check statements) before the case comes up next week.

3.Someone.........(clean room) when the police arrived.

4.The house looks different. She......... (repaint it).

5.I am not certain but I think she.........(steal wallet) at the airport.

6.She oughtn't to.........(mend ladder) before police had examined it.

7.Look at that woman's red hair!She.........(dye it).

8.The car was filthy so he......... (not wash it) today.

9.I.........(vaccinate my baby)against smallpox when he was six months old.

10.His employers.........(arrest him) ì he tries to leave the country.