There are hundreds of visitors __________ in front of the Art Gallery to have a look at Van Gogh’s paintings.
What he had said and done in the school ______ his parents and teachers.
—What are you anxious about? —_______.
The boss refused to sell the car for ________ he thought was not satisfactory.
―The river runs clear. ―We all appreciate the importance the local government has_______ the environmental protection.
Be careful that a good name of a product doesn’t _______ mean good quality of it.