Mr. Black ___ the party for one hour. A: has atteded B: has joined C: has been in D: has taken part in

A lot of language learning, ________ has been discovered, is happening in the first year of life, so parents should talk much to their children in that time. A: whom B: which C: as D: that

Now that English has taken over as the main language, the country's native language has been ( ). A: aliened B: familiarized C: marginalized D: popularized

Every detail which we will have to deal with ___ into consideration, our design seems to be feasible. A: has been taken B: is taken C: taken D: having taken

Don't worry too much about ____ mistakes. They are ____ natural part of learning. A: /; a B: the; / C: /; the D: the; the