138. pay for, pay back, pay off

　pay for为…付钱，pay back还钱，但不一定还清，pay off还清pay for the book, pay off the debt

137. die from, die of

　die from表示死于(枪)伤，虚弱，过度劳累，饮食过度等，die of表示死于疾病，饥饿，寒冷，年老，忧愁，失恋等精神因素die of hunger and cold

136. mean to do, mean doing

　mean to do打算，想要做某事，mean doing意思是，意味着By this I mean giving the students more practice.

135. gather, collect

　gather把分散的东西集中到一起， collect指精心地、有选择地进行收集collect stamps

134. look, seem, appear

　look指从外表上看，seem指内心的判断，appear指给人以表面的印象appear wise, look like his father

133. insist on, stick to

　insist on坚持要求，后常接doing, stick to坚持, 后常接sth. stick to the plan

132. notice, observe, catch sight of

　notice注意到，observe观察，仔细地看，catch sight of突然看到observe the stars

131. go for a doctor, go to a doctor

　go for a doctor去请医生，go to a doctor去看病

130. feed, raise

　feed喂养，养活，饲养 (to give food to)， raise饲养，养育 (cause to grow, bring up children) raise the family

129. continue, last

　二者均为持续，continue主动，被动均可，last只能用主动The war continued/lasted five years. The story is to be continued.