_______ any other species, human populations are shaped by the usual forces of natural selection, like famine, disease or climate.
Not until Jane got off the bus did she find her wallet______.
The classroom is so dirty that it needs________ badly.
Everybody, men and women, old and young, _____ sports and games.
I had forgotten the date of that important battle so I _____ a history book.
First he picked out the laces and ate them_______ they_______ spaghetti.