九年级期末题型突破 16 选择句子补全短文（七选五）补全短文 7 选 5一1 ． Here's what you can do. 1. Wear masks outdoors. Wearing a mask is one of the most effective ways to protect you from getting infected(感染)Make sure to wear it properly by tightening up the nose clip(鼻夹）and palling...
