Blue Whales

Some blue whales are longer than three buses ! They are largest animals in the world .They eat the very smallest animals that live in the sea and .......... (1) .......... fish eggs , too . Blue whales live in cool seas most (2) ......... the year because they can find more food there .But then there is ice on the water , (3) ......... whales swim to another part of the world . There , they (4) ........ When there is no ice , they swim back again ! Blue whales don't have teeth .They have a kind of moustache inside (5) ........... mouths which catches the food when they swim.

1 . first    here   sometimes                       2. with         of      at

3. these   both     lots                                 4. wait        waited      waiting 

5. theirs     them    their