第一部分 英语知识运用(共两节，满分30分)
第一节：单项填空(共20小题；每小题0.5分，满分10分)
从A、B、C和D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该选项标号涂黑。
1. Hiking is _____ great fun. You will get close to ____ nature and take exercise at the same time.
A. a; the B. a; 不填 C. 不填；the D. 不填；不填
2. With the word “ PM2.5” _________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
A. constantly B. consequently C. permanently D. immediately
