问题
选择题
Many couples feel lonely at home when their children to go to college.
A．grow up
B．have grown up
C．grew up
D．had grown up
答案
B
题目分析：考查动词的时态。句意：当孩子上大学后，许多夫妇会感到很孤独。根据题中提到 Many couples feel lonely at home夫妇在家感到孤独可见孩子已经长大，故用现在完成时。
考点 : 考查动词的时态