Measures have been taken to prevent accidents, but much ______ for more improvement.
Compared with other animals, snakes are believed to be below ____ in intelligence.
The film suddenly jumped from the events of 1920 to ____ of 1930.
The young boy has come to himself in hospital now. But he ___ unconscious for three days.
There’s an old saying ____ goes, “An apple a day keeps the doctor away.” This is especially true in the US, ____ apples are a huge part of food culture.
Owing to her balanced diet and regular exercise, she is very slim and athletic _____.