问题
选择题
Kate's dad is getting old. She will go back home to see him _____it is convenient.
A．because
B．whenever
C．although
D．Unless
答案
答案：B
题目分析:凯特的爸爸变得年迈了，她只要方便就会回家去看望他。Because因为，whenever,无论何时，although尽管，unless除非，结合语境，可知选B.