从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项标号涂黑。
1. ______ street crime is _______ great concern for many cities, especially in western countries.
A. /, a B. a, a C. the , the D. the, a
2. The world-famous writer is still ______ in thought, though he is over eighty years old.
A. lost B. deep C. sharp D. slow
3. You have no idea how she finished the relay race ______ her foot wounded so much.
A. for B. when C. with D. while
4. It’s necessary to be prepared for a job interview. ______ will certainly do you good.
A. Well dressed B. Well dressing C. Being well dressed D. Well dressing up
