Question

几个英语单选题求解释。

1. More than one student in my class _______( has, have )been abroad.
2. When and where to go for the on-salary holiday _______ ( has, have ) not been decided yet.
3. Each of the students in our class ______ great interests in English and they each ______ a copy of A New English- Chinese Dictionary.
a. show, have B have, has C shows, have D takes has
4. _______to his research work, the scientist cared little about any other things.
a. devoting b devoted c having devoted d to devote
5. The two countries are linked by _______of friendship going back many years.
a. joints b communications c bonds d connections
要求详细解释，谢谢！

Answer 1

1.选has，more than one看成是单数
2.选has，两个疑问句作主语看成是单数
3.选C，each of the students主语是each，是单数，they each 主语是they，是复数；再根据搭配show great interests in...可断定选C
4.选B，这是过去分词作状语的用法
5.选C，bond 表示一种连接彼此的亲密关系