根据首字母完成下列句子。
1. At last I r I had left my book in the library.
2. My sister has a dentist's a this Saturday.
3. There used to be various of animals on this t island.
4. Our main p is to inquire the possibility of establishing a long-term business relations with your
company.
5. But the t is that most of the doctors are facing the moral dilemma.