—What are you doing outside the class? Didn’t you hear the clock ______? —Sorry, sir. I ______.
Where we will build the dam has not been decided yet, ______?
The system is designed to give students easy ______ to the digital resources of the library.
One of the most important problems we will have to solve is ____of students’ learning method.
The house is nice, but ______ too small for a family of five.
______ from what he said, he must be the thief who has stolen the car.