根据句意及首字母提示完成下列句子。

1. Columbus d _____ America in 1492.

2. Gradually a smile a _____ on her face.

3. We should protect e _____ animals.

4. Some of the swamps have become p _____ .They are dirty now.

5. It's popular for city people to spend their vacation in the village with the v _____ .

因滥用抗生素造成的菌群紊乱病人不宜选用()

A．香连片

B．补脾益肠丸

C．葛根芩连片

D．固本益肠片

E．以上均不是