When ______ by the teachers, a student tends to study harder than usual.
A．to be praised B．praising C．praised D．to praise
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.
A．crying; to save B．crying; saving
C．to cry; to save D．cry; saving
He pretended _______ a book when his mother entered the room.
A．to read B．to have read C．reading D．to be reading
The production of the factory has grown to _____ in 1999.
A．twice as it was B．twice what it was
C．as twice as it was D．twice that it was
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 _____________.
A．was blamed B．was to be blamed C．was to blame D．would be blamed
____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
A．If B．As C．Because D．While
