Li Ming went abroad in 2000.—No wonderI ______ him ever since

Our school is so famous that ____people come and visit it every term.

One of the most important problems we willhave to solve is ____of students’ learning method.

u see a child dressed in red pass by—-Sorry, I _____ the poster on the board withoutnoticing anyone.

Previously we wish some of the things ________ effortless, but we now find them unattainable.