单项选择题 The sentence that has a NP and a VP can be shown in a （） formula “S→NP VP”.

单项选择题 Of the following sound combinations， only （） is permissible according to the sequential rules in English.

单项选择题 The famous quotation from Shakespeare’s play “Romeo and Juliet”: “A rose by any other name would smell as sweet” well illustrates（）.