1. The world relies heavily on fossil fuels, yet other excellent sources of energy???? Hydroelectricity, for example, is a very attractive from of energy.1) offer a lot of disadvantages
2) cannot be replaced
3) have already been developed
4) are much less efficient
| 2. The Sydney Olympics was regarded as???success.1) greatly
2) A great
3) A most
4) Mostly
| 3. He is happy to welcome you into his home, ????.1) a small apartment on sukhumvit road
2) his father came from china
3) that is, his bedroom is being repainted
4) he is a part-time teacher
| 4. I agree that right now the greatest threat is terrorism. But I also believe that terrorism and poverty are interlinked. And as terrorism is a threat to security,???.., because when people are poor, they are more dissatisfied.1) so is poverty
2) we can´t help it
3) they are in danger
4) it is true
| 5. The sex of a child is determined by parents chromosomes called sex chromosomes, X and Y. The mother always contributes an X. The father, on the other hand, may contribute either an X or a Y. ??.., the chromosomes from the mother and father form one of two patterns : an XX-a baby girl, or XY-a baby boy.1) Surprisingly then
2) Therefore, when united
3) However, if separated
4) Consequently, from time to time
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