In the cross-lake swimming race, a boat will be ____in case of an emergency.
_______ which way to take, the little boy behaved like a real gentleman who comforted his sister from time to time.
There were many more people who got injured in the big fire than _______.
This robot is supposed to save a lot of labor, but it remains a problem if it ______.
With his eyes ______ on the family album, he thought of the fun he had when he lived with his parents.
Postage ______, the necklace will cost you at least 650 yuan.