In the text,

"better" (l.7) is the opposite of worse.

Based on the text, it can be concluded that

teachers usually make no difference between second and foreign language.

Based on the text, it can be concluded that

even when we are preparing our curriculum or a lesson, the difference between a second and a foreign language is not relevant.

Based on the text, it can be concluded that

a second language is that one you learn in a foreign country where this language is the native language.

Based on the text, it can be concluded that

if you are English and you are learning Portuguese in Brazil, Portuguese will be a second language for you.

Based on the text, it can be concluded that

English learned in Australia can be considered a foreign language.

Based on the text, it can be concluded that

a foreign language environment is that one found by a Brazilian learning English in the USA.

In the text,

"much" (l.1) can be replaced by many.

In the text,

"readily" (l.14) is synonymous with promptly.

In the text,

"those" (l.13) refers to "contexts" (l.13).