Scientist used to believe that our 24-hour cycle of sleeping and walking was governed entirely external factors. The most notable of these, they thought, were the rising and (23) of the sun.

I offered to help her but she said: ‘’No, thanks’’ (TURNED)

Write about the famous place in Vietnam you have visited

Choose the underlined words or phrases that are not correct in standards written English 

He made his first film when he is 12 years old

The main function of this “body clock” is to anticipated and (24) for external changes so that, for example, body temperature starts to rise (25) dawn, gearing us up for the day, and begins to fall in the early evening, winding us down for sleep.

The main function of this “body clock” is to anticipated and (24) for external changes so that, for example, body temperature starts to rise (25) dawn, gearing us up for the day, and begins to fall in the early evening, winding us down for sleep.

Insomnia, depression, fatigue, poor work performance and even accidents can all be (27) or aggravated by inaccurate body clocks.