1) Scientists are concerned...... the environment. A) in B) on C) to D) about 2) she rarely..... part in school activities. A) take B) takes C) taking D) is talking 3) My mom works part-time ...... a local supermarket. A) at B) on C) from D) about 4) which Vietnamese vacation is.....? A) long B) the longest C) longer D) longest 5) there aren't any good movies..... at the moment. A) for B) on C) in D) to 6) we have a five-minute.....between classes. A) stop B) time C) period D) break 7) is it.....to find an apartment in Ha Noi ? No, it's difficult to find apartment in Ha Noi. A) mordern B) cheap C) easy D) expensive 8) which Vietnamese vacation is.....? A) longer B) long C) longest D) the longest 9) Vietnamese people always.... Tet holidays with their family and relatives. A) use B) do C) spend D) live 10) ..... is what you like doing when you are not working A) sport B) pastime C) school D) homework