117. drop, fall

　drop及物不及物均可，fall不及物动词 Prices fell/dropped. He dropped his voice.

116. shoot, shoot at

　shoot射死，shoot at瞄准，但不一定射中 He shot the bird and it died.

115. rob, steal

　rob抢劫 rob sb. of sth.，steal偷 steal sth. from sb.

114. leave, leave for

　leave离开，leave for前往 He left Beijing for Shanghai.

113. answer, reply

　answer及物动词，reply不及物动词，后接 to reply to the letter

112. discover, invent, find out

　discover发现本来存在但不为人所知的东西，invent发明本来不存在的物体，find out发现，查明 At last he found out the truth.

111. want, hope, wish

　want打算，想要，want to do, want sb. to do, hope希望(通常可以实现)，hope to do/ hope that… wish希望(通常不能实现)wish (sb.) to do, wish sb/sth. + n. I wish you success.

110. learn, study

　learn学习，侧重学习的结果，study学习，侧重学习的过程，研究

　study the problem

109. join, join in, take part in

　join加入某个组织，并成为其中的一员；join in参加小型的活动, join sb. in；take part in 参加大型的活动 He joined the army five years ago.

108. spend, take, pay, cost

　spend人做主语，花钱，花时间; spend…on sth./in doing sth; take物做主语，花时间; pay人做主语，花钱，pay for; cost物做主语，花钱