It is predicted that over the next few decades many species will die   ......... as once fertile areas turn to desert,

But for her help, I _    

______it not been for the heavy rain, we would have gone camping.

Today the move away from rigid rules makes it much easier (1) ________ the right way to behave because there are fewer out and out ‘wrongs’. Of course there are still a few situations where inflexible rules (2) ________, although these are mainly concerned with official functions. But nine times out of ten, the way you choose to behave is (3) ________ you, with one very important proviso: that you keep firmly in (4)________ the basis (5)________ etiquette has grown up; in other words, the need always to consider other people's feelings first. 
Some people, for instance, are very informal and outgoing by (6) ________, while others prefer to be more reserved and formal. Younger people tend to be less formal than their parents. Habits can (7) ________ in different parts of the country. Behaviour which may be commonplace in the capital - like arriving later than the stated time - can often be unconventional (8) ________. Just remember the basic rule of consideration for others, and when in doubt, follow the example of those around you. Etiquette is a skill that is easily learned and it brings the benefits of other people's appreciation whenever you (9) ________ in practice. It's a pleasure to spend time with people who are reliably courteous and (10) ________; it's also pleasant to feel that you will always know what to do or say in any circumstances, mundane or extraordinary
(4).....................

 To Americans, it is impolite to ask someone about age, ________and salary. 

Identify the one underlined word or phrase A, B, C or D that must be changed for the sentence to be correct: 

Water skiing is a sport and recreation activity and is popular in many countries around the world where appropriate conditions exist.

In 1919, Sir Reginald Fleming Johnston was __________ as a tutor to Puyi, who was the last emperor of China. 

Before he went on vacation, Peter left explicit instructions for the decoration of his office.

Identify the error in each sentence: I found my new contact lenses strangely at first, but I got used to them in the end

A ……….. eruption occurred here last night. 

Thuy Duong appreciated ..............  for her excellent study results.

Choose the best answer:
Dozens of applicants showed up for the vacant position, but only a handful of them were shortlisted for the interview.

James is now too old to live on his own, so he is being _______ by his daughter.

I can't wait for the river to ________ so we can do some ice fishing.

Choose the best answer among A, B, C or D that best completes each sentence: By the time he arrives everything ………

Identify the one underlined word or phrase that must be changed in order for the sentence to be correct.

I did not realize that I had left my umbrella on the bus when it started to rain.

They required that each member _    twenty-five dollar.

At the …. to the village, we saw the accident. 

The accident  .......   was the mistake of the driver.

He put the two letters into the wrong envelopes ______ mistake.

If you _    English well, you will communicate with foreigners.