1．You’d better take a sweater with you （以防天气变冷）．（get）
2．Water pollution is a big problem and 20℅ of the people on earth （喝不到） clean drinking water.（access）
3．A major problem arose at the meeting _____________（要花多少钱） to complete the whole project．（cost）
4．_____________ （他一到达） when he received an important letter from his former classmate．（Hardly）
5．My daughter was badly hurt in the accident．I really regretted __________ （没有开车去接她） from school yesterday．（pick）
