Online courses have become more and more popular.2. Many people have realized the importance of waste sorting.1. 我们从现在开始要采取有效的措施了。2. 众所周知健康生活很重要。3. 我们可以得出结论，在线阅读给我们带来了很多好处。

[问答题]Directions: Nowadays, with thedevelopment of technology, e-books have becom

2.Chinese lessons have become popular in the United States, with twice the numbe

[单选题]［A］ As more has become known of the many thousands of African plant species and their complex ecology, naming, classification, and mapping have also become more particular, stressing what was actually present rather than postulating about climatic po

[单选题]［A］ As more has become known of the many thousands of African plant species and their complex ecology, naming, classification, and mapping have also become more particular, stressing what was actually present rather than postulating about climatic po

[单选题]［A］ As more has become known of the many thousands of African plant species and their complex ecology, naming, classification, and mapping have also become more particular, stressing what was actually present rather than postulating about climatic po

[单选题]［A］ As more has become known of the many thousands of African plant species and their complex ecology, naming, classification, and mapping have also become more particular, stressing what was actually present rather than postulating about climatic po

[单选题]［A］ As more has become known of the many thousands of African plant species and their complex ecology, naming, classification, and mapping have also become more particular, stressing what was actually present rather than postulating about climatic po

[单选题]More and more high——rise buildings have been built in big cities space.A．in search ofB．in place ofC．for lack ofD．for fear of

The huge fire is reported to have ______ more than 300 people dead.A. remainedB.

Judging from the passage, people have more chances to survive fires in aircraft