3. It is well known that natural light is actually made of many colors.

4. I prefer shopping on line to shopping in a department store because the former / shopping online is more convenient and effective (time-saving) (can save more time).

5. To our delight, she adapted (herself) to campus life a month after entering college.

GROUP 10

1. He complained that no sooner had he started the machine than it stopped working.

2. I needn’t have put on my best suit to go to the party.

3. It is necessary for us to have a good night’s sleep before the test.

4. This is the first time that I heard “Happy Birthday to you” sung in Italian.

5. He introduced me to his students, most of whom are English majors.