Can those ____ at the back of the classroom hear me—No problem.

xt day is Thanksgiving Day,a special moment_________ we can express our gratitude, respect and love we feel all year round

What the science teacher does and says ____ of great importance to college students.

The places of interest in Xi’an attract my family all the time, and I hope we _____ ourselves this time next year

They are broadening the bridge to ________ the flow of traffic.(2011·山东)