All of us still remember the terrible tsunami that _____ the areas in the southeast of Asia in 2004.

The opportunity Jack had looked forward________at last when he was named chief engineer in the project.

It suddenly        to the teacher that he hadn’t left any assignments(作业) to his students.

My mother asked me where _____, and I told her that I was going to buy some food.

He came to my class every week, but his attitude ________ he was not really interested in the subject.