II ①A feature of English in the last 200 years or so has been the birth of a number of national varieties. It is important to note, however, that the different varieties are relatively similar to each other; for the most part, speakers of …

I Answer the questions below after reading the following passage. ①Human intelligence is a puzzle. Although using IQ scores as a measurement of intelligence is controversial, some scientists believe we can use them to argue that intelligen…