1.Don’t lose heart. (无论如何),you can try.
2.Credit cards have brought about a (革命) in people’s spending habits.
3.Unfortunately,a new difficulty has (出现了).
4.With the development of (技术),more and more practical machines have been invented.
5.At first,I thought these flowers were real,but they are (人造的).
6.While there are quite a few differences in the education systems in many countries,education is (普及的).
7.We should not judge a person by his (外貌) but people make that mistake from time to time.
