New words or expressions like astrobiology, earthrise, open heart surgery come into present-day English vocabulary due to____.

Illustrate the differences between blending and clipping by taking motel, medicare, quake, flu as examples.

Explain context in a narrow sense.He was in a mood of complete euphoria, his happiness being the result of an announcement that he had won the sweepstakes.

Comment on the following pair of sentences in terms of superordinates and subordinates.A)Trees surround the water near our summer place.B)Old elms surround the lake near our summer cabin.

How policeman, constable, bobby and cop differ in the sense of connotation?

Group the following words into denominal nouns, deverbal nouns and de-adjectival nouns, according to the noun suffixes fixed at the end of each word.cigarette，slavery, productivity，protection, assistant，trainee, largeness，friendship

idioms

What does the following group of words show us as regards the main sources of new words?soy milk, family movies, telequiz, Watergate, open university

elevation (referring to word meaning)

morpheme

onomatopoeic motivation