单项选择题The book on the fictional town of Mariposa presumably ______.
单项选择题NBAC will leave the issue of embryo research undiscussed because ______.
单项选择题Eat, eats, ate, eaten, eating share the same basic meaning and grammatically they are the inflectional variants in the paradigm of the verb EAT. Word used in this sense is known in linguistics as
单项选择题Emily Dickinson wrote many short poems on various aspects of life. Which of the following is NOT a usual subject of her poetic expression
单项选择题In Smith’s view, monopolies ______.