Điền giới từ thích hợp:

91. It was certainly kind ____ you to help me.
92. Mrs Brown is often worried ____ money.
93. Her parents are very pleased ____ her French.
94. I’m not interested ____ politics.
95. She was sad because he was rude ____ her.
96. She was angry ____ Tom.
97. Travelling by air if preferable ____ travelling by train.
98. Thank you. You are kind ____ me.
99. Everybody was surprised ____ the news.
100. I was delighted ____ the present you gave me.