2. It is time to take the advice of … and to put special emphasis on the improvement of …
3. There is no doubt that enough concern must be paid to the problem of …
4. Obviously, … If we want to do something … , it is essential that …
5. Only in this way can we …
6. It must be realized that …
9. I quite agree with the statement that … The reasons are chiefly as follows.
12. Attitudes towards...vary from person to person.
13. There are different opinions among people as to …
14. Different people hold different attitudes toward (failure).
（素材來自網絡，如有侵權請聯系刪除）
