In the passage below, the numbered gaps (11-20) indicate missing words. From the options lettered A- E the most appropriate option.

The head of the -11- is called the queen bee. She is -12-than the rest of the bees. Her main task in the colony is to lay eggs. Most of the other bees are the -13- bees. These bees collect nectar and -14- from flowers. The nectar that is carried by the worker bees is deposited on the hive and then -15- into honey. The worker bees also help to look after the young bees. As soon as they are -16-, the worker bees feed the young bees with pollen and nectar. The third type of bee found in the colony is the -17- or male bee. The main task of such a bee is to -18- with a new queen. The queen bee has a life span of about three years. During this period, she would have -19- more than half a million eggs. When the queen bee is dying, a new queen would be groomed. This new queen will eventually take over the duties of the old queen when the -20- dies.