51.The government spent much more in the last quarter than planned___________it spent considerably less in the previous one.
1.whereas
2.before
3.until
4.when
52.For more than 100 years,scientists have argued over exactly what a panda is.Now,____,with the help of DNA testing, the panda has been admitted to the bear family.
1.moreover
2.accordingly
3.as a result
4.finally
53.Pasta and seafood seem to make up most of the entrees on the menu._______,they are our favorite things to eat.
1.Unfortunately
2.Luckily for us
3.Consequently
4.Fortunately to hear
54.There is no doubt that Africa has ______ in the world.The largest desert, one of the most extensive rain forests, and the sites of great civilizations such as ancient Egypt are there.
1.a huge area of land
2.one of the most interesting attractions
3.some of the most striking features
4.the longest and most interesting history
55.Generally, we maintain balance with ourselves by liking people who are similar to us and who like what we like. Still,it is __________ or to dislike people who like what we like.
1.important to maintain balance with ourselves
2.possible for us to like someone with different attitudes
3.our commonalities that make us feel comfortable
4.frustrating to like people who do not like what we like