单项选择题
If only ______ the violin in the middle of the night, she'd be an ideal guest. ( )
单项选择题 ——What do you think of his ______ play ( )——I like it much better than his ______ one.
单项选择题 The boy showed complete ______ of his parents' advice. ( )
单项选择题 ______,I should not have wasted my time trying to explain matters to you. ( )
