87. Only when you passed the test requires________你才能申请驾照

　　88. working mother today feel it difficult ______________保持事业和家庭之间的平衡

　　89. we ______________本来可以避免这个愚蠢的错误，but we did not follow his advice.

　　90. He is well into thirties, it is about time he_______________安顿下来，开创一番事业

　　91. if you_______________发现自己在排队等候，at a supermarket checkout counter, are you likely to get impatient.