单项选择题In our daily life we often hear such expressions as Wonderful weather we Pre having or Good morning. Which function of language do those expressions manifest
单项选择题In the mass extinction 65 million years ago, ______ of all species on earth vanished.
单项选择题Why was Leacock dubbed as a pro-American British imperialist
单项选择题The author was probably ______.
单项选择题Leacock can be described as all of the following EXCEPT ______.