---Why did the policeman question Tom?---He was ________of taking part in the killing.
It is so wet there that the trees are extremely tall, some ________ over 90 metres.
Rather than ___ on a crowded bus, Tom always prefers __ a bicycle.
Perseverance is a kind of quality --- and that’s ________ it takes to do anything well.
A heavy learning burden leads to unhealthy behaviors such as poor eating habits, which ___ damage the health of students.
How did you ___ to paint the whole house in a week?