Giúp mk vs các bn ơi

81. I could hardly understand what the headmaster said.
82. I have never visited such a beautiful city before.
83. I didn't arrive in time to say goodbye to her.

85. The children whose parents are very busy are looked after by the woman.
86. Unless she works harder, she'll lose her job.
87. If this bag weren't heavy, I could carry it.
88. He wishes he had invited Jane to his party.
89. She apologized for being late.
90. In case it rains, you should bring a raincoat.
91. Why don't we visit the museum next Sunday?
92. He is not tall enough to reach the top shelf.

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