(1)Meteorologists (DIVIDE)________ the infinite varieties of cloud formation into ten basic types.

(2)Not all of them make shapes – some are just too blurry and indistinct (HAVE)________ any clear edges to them. (3)But the most distinct (BE)________ the sharp-edged "cumulus" clouds, which are the fluffy cottonwool tufts you see on a sunny day. (4)They often look like elephants. (5)This is because they can develop vertical towers, borne on rising columns of air (thermals).

(6)After about ten minutes, the (CLOUD)________ droplets start to evaporate at the sides, (LEAVE)________ a central trunk that curls upwards as it (BLOW)________ along in the wind and looks like the trunk of an elephant.

(7)This might be why ancient Hindus and Buddhists believed elephants (BE)________ the spiritual cousins of clouds.