1. The author wants to convey his views on praise and criticism to readers through this article.

The author wants to convey her views on praise and criticism to readers through this article.

Of the dozen waitresses in the restaurant, only three have worked before.

Of the twelve waitresses in this restaurant, only three have done this kind of work before.

Although this teacher is not a great scholar, he does know how to teach vividly and interestingly.

The teacher may not be a great scholar, but he does know how to make a course lively and interesting. (in a ... way)

We often find it much more difficult to apply a rule than to understand it.

We often find it much more difficult to apply a rule than to understand it.

She never scolds the children for their quarrels. On the contrary, when they play quietly, she will praise them a few words.

She never scolds children for quarreling, but praises them when they are playing quietly.

6.mr. green is always critical of his daughter's works, but somehow, he gives her a good comment on her poorly written poem.

Mr. Green is always critical of his daughter's writing, but somehow he speaks highly of her poorly written poems.

7. Quite a few students in our class were publicly criticized by the teacher for not handing in their compositions on time.

Many students in our class were criticized by the teacher for not handing in their homework on time.

8. A good teacher should pay close attention to the progress of students. Students will feel discouraged if their progress is ignored.

A good teacher should be very sensitive to the progress of students. If students' progress is ignored, they will feel depressed.