A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
Her little son fell off the boat into the water due to her carelessness. The mother couldn’t help _____because she couldn’t help _____ her son out of the danger.
He pretended _______ a book when his mother entered the room.
The production of the factory has grown to _____ in 1999.
What troubled the teacher was that no one present made an answer when asked who had broken the glasses, so he didn’t know who _____________.
____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.