Scientists study human brains work to make computers.
| A．when |
| B．how |
| C．that |
| D．whether |
Although John was the eldest in the family, he always let his sister _____ charge of the house.
| A．take | B．hold | C．make | D．get |
The island where these rare birdsnest has been declared a _____.
| A．observation | B．reservation | C．preservation | D．conservation |
Kate's ambition to become a nurse _____ from a desire to help others.
| A．prompted | B．promoted | C．programmed | D．proceeded |
Dress warmly, _____ you'll catch cold.
| A．on the contrary | B．or rather | C．or else | D．in no way |
This book gives a brief _____ of the history of the castle and details of the art collection in the main hall.
| A．outline | B．reference | C．article | D．outlook |