请用括号里的词组或单词

He defended his standpoint successfully,which is very impressing.
Whether he can be admitted by Fudan University depends on the result of his entrance examination.
The suggestion you put forward yesterday deserves further consideration.
We must develop the natural resources of our country.
There is no doubt that environment has a great effect on children's growth.
I'm not clear about his travel,but he is expected to return in three months.
People who want to go abroad will experience difficulties in getting their visas.
They always argue for the sake of arguement,but never reached any practical conclusions.
They keep in touch with each other in the form of telephones in stead of letters.
It's said that the coming physical examination was really hard,so we must be fully prepared.