1) It is advisable to exercise(拥有) patience in dealing with such complicated situations.
2) It is advisable to place important telephone numbers nest to the phone in case of an emergency.
3) It is biologically reasonable for deer to reduce their cost of living to increase their chances of surviving in winter.
4) It is essential that the increase in production should be geared to (适应) the increase in public demand.
5) It is necessary that young and old people should communicate more with each other.
6) It is thoughtless of some parents to allow their children to watch whatever program is on television.
7) It is incredible(不可思议) that he ate the big cake just in tow bites.
8) It was obvious to everyone that the marriage would sooner or later end in separation if not diverce.
9) It was clear that Dad could do no more than he was doing already.
10) It is certain that fresh air and exercises are more valuable than medicine.
11) It is certain that with determination and hard work you will succeed eventually.
12) It was quite apparent that both sides were making a great effort to win the prize.