1.Read the passages below and the sentences that follow.Changethe words (in the sentences)in bold print,according to the infor-mation in the passages.Coal.It w
Experiments of the melt-peridotite reaction at pressures of 1 and 2 GPa and temperatures of 1250–1400°C have been carried out to understand the nature of the
Sandwiches are common inmany countries. Where did thisstrange name come from? The Earl of Sandwich(1718-1792) was an English-
Sandwiches are common in many co