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.
Not until his mother came in ________to prepare his lessons.
“We can’t go out in this weather,”said Bob,________out of the window.
I promised to write to her ________I got to New York.
The number of people invited___fifty, but a number of them ____absent for different reasons.
The parcel_ __a lot of things ,_____a secondhand dictionary.