-Imagine you are outside when ______ earthquake comes. What should you do?
-Go to _____ space away from buildings or trees.
| A．the; the |
| B．the; an |
| C．an; the |
| D．an; an |
Look! The road ____________
| A．is repaired | B．was repaired | C．is being repaired | D．was repairing |
The primary purpose is to _____ those achievements in biological research _____ the public.
| A．make; known by | B．make; known to | C．make; know to | D．make; knowing by |
____ new cure for this disease that medical experts have recently developed proves to be ______ most effective, although it can not completely kill all the viruses.
| A．A; a | B．The; / | C．/; the | D．A; the |
— What made your skin look so terrible?
— _______ to the sunlight for a long time.
| A．Because it was exposed | B．After being exposed | C．Being exposed | D．Exposed |
Only after a baby seal is pushed into the sea by its mother _____ to swim.
| A．how will it learn | B．will it learn how | C．it will learn how | D．and it learns how |