16. There are _________ that not only governments but also individuals should join hand to tackle. A. too numerous environmental problems B. such a lot of environmental problems C. so fewer environmental problems D. such many environmental problem 17. She started to laugh,_________herself. A. in spite of B. on account of C. in addition to D. even though 18. You should stop working too hard_________youll get sick. A. otherwise B. if C. in case D. whereas 19. You may get malaria_________you are bitten by a mosquito. A. if B. so that C. though D. unless 20. She got the job_________the fact that she had very little experience. A. although B. because of C. despite D.because 21. I studied English for four years in high school. ______,I had trouble talking with people when I was traveling in the US. A. Therefore B. Otherwise C. Although D. However 22. My sister won't go to the party tonight and __________. A. so will I B. I will too C. neither will I D. I will neither 23. I will stand here and wait for you _______ you come back. A. because B. though C. so D. until 24. Businesses will not survive ________ they satisfy their customers. A. otherwise B. in case C. unless D. if 25. In Britain, most shops close at 6 pm,_________in other countries they often open in the evening, too. A. despite B. moreover C. nevertheless D. whereas 26. _________his income of current job is relatively low, he finds it difficult to make ends meet. A. Although B. As C. Because of D. In spite of 27. _________Allans inexperience as a midfielder, he played well and scored a decisive goal in the final match. A. Since B. Although C. Despite D. Because of 28. _________, he walked to the station. A. In spite being tired B. Despite of tiredness C. Although to be tired D. Despite being tired 29. _________busy she is, she manages to pick her children up after school every day. A. However B. Although C. Despite D. Because 30. Her eyes are red and puffy_________she has been crying a lot. A. although B. since C. because of D. despite