Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.

Ju Hua Tai is a popular song among young people, ___were often heard singing it in Karaoke.

.It is no use ______ after you know your failure.

If you don’t resist smoking heavily like that , you will have to suffer the _______sooner or later .

.She couldn’t ______ the fact that the money was found in his house.