.--- What do you think made Mary so upset? --- __ her new bicycle.
The computer was used in teaching. As a result, not only _______, but students became more interested in the lessons.
The rise in electricity costs has _______ our difficulties in carrying out the project.
A dozen ideas were considered _______ the chief architect decided on the design of the building.
-----Hi, Tina, can I use your car for a while this afternoon? ----- Sorry, _______.
“Attention, please. Whoever can answer one of my questions _____ receive a prize,” the teacher said in class.