During the ___ two decades, research has greatly expanded our knowledge about the sleep and dreams.

单选题

During the ___ two decades, research has greatly expanded our knowledge about the sleep and dreams.

答案解析

单选题

He has only a two-week vacation during the year despite the fact that other workers get more time _____

答案解析

单选题

Research findings show we spend about two hours dreaming every night,no matter what we（ ）during the day.

答案解析

单选题

During the ten thousand miles journey across the desert, a great number of people dropped with ___.

答案解析

单选题

Between the two buildings ___ a monument.

答案解析