一Look! There is a small bridge on the river.一It ________ two days ago.
This problem worried her so much that she didn’t know ___________ with it..
--- ________ David be the new chairperson of the Students’ Union?--- He _______ be, but I’m not sure.
—Liu Xiang has announced the end of his sporting career.— . But I think he is still one of the greatest athletes in China.
Jack is dishonest. He always some excuses for doing something wrong.
—Mr. Ma has gone to Guangzhou on business.—Really? Do you know ?