1 . 词性转换
1. vital            (adj.)          ___________ (v.)
2. urgently       (adv.)          ___________ (adj.)
3. security        (n.)            ___________ (v.)
4. pollution       (n.)            ___________ (v.)
5. concern        (v.)            ___________ (adj.)
6. accumulation (n.)            ___________ (v.)
7. governance   (n.)            ___________ (v.)
8. regulation     (n.)            ___________ (v.)
9. opposition     (n.)            ___________ (v.)
10. benefit          (n.)     __________ (adj.)

2 . Working part-time as a student can help me learn to interact with people and_____working experience, which will be beneficial to my future career.

A．overcome

B．regulate

C．accelerate

D．accumulate