IWMD 4) （          ）(starts / started) in Canada. April 28 was chosen as it is the anniversary (周年纪念) launch of the Occupational Safety and Health Act (《职业安全与健康法》) in the USA, which gave the government the right to set safety and health   5)（          ）（policies/signs）for the country＇s workers.

Since 1989, trade unions in the USA, Asia, Europe, and Africa 6) （          ）(have organized/ has organized) events on and around April 28 to remember those who have died while 7)（          ） (in / at) work. It is hoped that 8)（          ）(more /many) attention can be paid to workplace illness, injury, death, and their causes.

2. The young boy did not know how to loosen the(        )with a screwdriver.

3. The 5-year plan aims to (        )people's lives and make them have a higher sense of happiness.

4. The young worker has got a really (        ) attitude towards life.

5. My car had a(        ) on my way to the factory, so I had to take it to the garage.

6. Don't use this hacksaw. It's not(        ).