After ________ his right arm, he keep on ________ with his left arm.
When the teacher came in, he saw some boys _______ behind Daniel, _______ the computer games.
It _______ long ______ we know the result of the experiment.
--- Would you please give him the paper the moment he _______? --- No problem.
---Teenagers are sometimes made _________ ______ they are not_________. --- I agree.
He enjoys a cup of coffee in the afternoon sometimes, but ______ he drinks tea.