6．-About ________of the teachers in their school were born in the 1980s．
-The rest ________ born in the 1970s．（ ）
-The rest ________ born in the 1970s．（ ）
| A． | three-fourths； were | B． | three-fourths； was | ||
| C． | three-fourth； are | D． | three-fourth； is |
5．Ronald Amundsen is considered to be one of the greatest ________ in history because he was the first man to reach the South Pole（南极）．（ ）
| A． | writers | B． | composers | C． | president | D． | explorers |
4．I often doubt ________．（ ）
| A． | that this song is worth listening to | |
| B． | if this song is worth listening | |
| C． | that this song is worth listening | |
| D． | if this song is worth listening to |
3．-Lisa，what do you think of the job of being a nurse？
-In my opinion，it ________ be difficult sometimes though it seems easy．（ ）
-In my opinion，it ________ be difficult sometimes though it seems easy．（ ）
| A． | should | B． | can | C． | must | D． | need |
2．-Is Russia ________ European country？
-Yes，though a large part of it is in________ Asia．（ ）
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-Yes，though a large part of it is in________ Asia．（ ）
| A． | a； a | B． | an； the | C． | a；/ | D． | an；/ |