I. 语法和词汇知识（共30小题；每小题1分，满分30分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项.
1. Marker works outside and he is always _____________ about the health of his aging parents.
A. concerning B. afraid C. troubled D. concerned
2. The country has ______too many wars, making her people __________ a lot.
A. got through; pay B. looked through; face C. gone through; suffer D. passed through; destroy
