不劳而获。[两次舀水，两次咧嘴]
73. We should keep our promise.
我们应该遵守诺言。
74. He should speak more slowly.
他应该说的更慢。[长音*短音*长音*卷舌音*舀水]
75. Girls should not stay out late at night.
女孩子晚间外出不可太晚回家。[卷舌音*短音*感叹祖国山水大嘴音*咧嘴音*“啊噢”鬼哭狼嚎大嘴音*咧嘴音**略音*爱的大嘴音]
76. I've really enjoyed talking to you about old time.
我很高兴与话旧。
77. You should have gone to see the doctor earlier.
你早就该去看医生了。
78. I had a test this morning. I didn't do well on the test because I didn't study for it last night. I should have
studied last night.
今天早晨我去考试了。考得不好，因为昨晚我没复习。昨晚我要是复习
就好了。
79. We went to the movie, but it was a bad movie. We wasted our time and money. We should not have gone to the movie.
我们去看电影了，但影片很差。我们浪费了时间和金钱。早知道就不去了。