选择与你听到的句子意思最相近的句子（理由）,题在下面 理由!
1.either tom or jim will give us a talk on english names.
A tom will give us a talk on english names if jim does not
B neither tom nor jim will give us a talk on english names
C both tom and jim will give us a talk on english names
2.it is kate's turn to clean the blackboard this time
A it is the turn to clean the blackboard this time,kate
B it is the turn of kate to clean the blackboard this time
C 排除吧