Before making the decision, we must make sure that we have taken all the related factors into consideration/account.
If he knew my phone number, it would save a lot of trouble.
If he knew my phone number, it would not take a lot of trouble.
As far as his experience is concerned, he is not very suitable for acting as a headmaster.
What we are concerned most is the quality of drinking water in that city.
His achievement earned him respect and admiration among people.
His achievement won people’ respect and admiration.
No sooner had he arrived than he fell ill.
7. 坦率地讲， 能在这么短的时间内完成这项任务，确实令人兴奋。
Frankly speaking, to be honest, honestly speaking, it is very exciting to have the task finished/accomplished/fulfilled in such a short time.
We will make as many improvements as possible in our work.
Positive leisure attitude is the basis of encouraging people to make creative use of their spare time.
The more you explain, the more confused I am.
Generally speaking, acid rain is the result of industrial development.
whether (it is) heated or not, this material does not melt in ice.