Question; #9: Answer D also correct, simple past. #19: Answer C also correct, simple past. #34: Answer B also, if describing his PRESENT lack of knowledge about a planned future surprise. #46: Answer D also seems correct, if referring to her future prospects at the upcoming contest. #51: Answer B also, if referring to his ABILITY to complete the project by tomorrow, or the fact that he is being allowed or permitted to take until tomorrow to finish the project.