根据汉语意思，完成下列句子，每空一词。
81. 父母经常说我们太年轻，不能自己做决定。
Our parents often say that we are ______ young ______ decide for ourselves.
82. 随着时间的流逝，他忘记了那些不愉快的事情。
As time ______ _______, he forgot those unpleasant things.
83. 你曾考虑过出国深造吗？
Have you ever ______ ______ abroad for further study?
84. 如果你想得到更多的信息，你可以打电话或发邮件给我们。
If you want more information, you can ______ ring ______ e-mail us.
85. 他开会迟到了，因为他的车在半路坏了。
He was late for the meeting because his car ______ ______ halfway.
86. 他多次尝试过戒烟，但都失败了。
He tried ______ ______ smoking several times, but failed.
87. 我突然想起我把钥匙忘在办公室里了。
I suddenly ______ ______ my keys in the office.
88. 这道题太难了，我们都做不出来。
It was ______ difficult a problem ______ none of us worked it out.
89. 是时候采取措施治理污染了。
It’s time to take measures to ______ ______ pollution.
90. 抱歉，我错拿了你的包。
Sorry, I took your bag ______ ______ .
