3、动词 + 副词 + 介词：
cut down on减少 get along with与…相处 run out of 用光 look up to尊敬 date back to追溯
get through with完成 keep up with 跟上 make up for 补偿 come down with患病 sit in on旁听
do away with 抛弃 look forward to 期望 put up with 忍受 stand up to反对 look down upon瞧不起