52. ______ killing of so many protected animals made _______ stir in the local people.
| A．/; / | B．The; / | C．/; a | D．The; a |
Modern science and technology has ___ communication between people far apart.
| A．made convenient | B．made it convenient |
| C．made it convenient for | D．made it convenient to |
My enthusiasm for Chinese football team gradually ____ because of their countless failures.
| A．disappeared | B．faded | C．ran out | D．gave up |
As you are now a member of our society we shall let you ____ our secrets.
| A．into | B．through | C．to | D．between |
__ many times, but she still didn't know how to do it.
| A．She was taught | B．Having taught | C．Having been taught | D．She has taught |
Scientists think that the continents ____ always where they ___today.
| A．aren't; are | B．aren't; were | C．weren't; are | D．weren't; were |