—Someone might see us.— ?we are not doing anything illegal.
On the international market, the price of petroleum has been falling down, which is now _____ it used to be.
We can no longer ____to consider water an almost free resource that we can use as much as we like.
After talking with his father for about half an hour, he felt better and began to know how to ____ this kind of situation.
---I failed today’s math test! What shall I do?---____! Try once more.
He lost his job three years ago; _____, he was seriously injured in an accident last week.