太阳活动对地球的影响表现有（　　）

A．扰乱地球上空的电离层，使地面的无线电短波通讯受到影响，甚至中断

B．使地球气候异常，从而产生“磁暴”现象

C．在地球各地的夜空产生极光

D．使地球高层大气高速散逸到星际空间

Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams can tell us about ourselves. It’s like our (11) is talking to us.

Why are dreams (12) strange and hard to understand Some people think our brain uses (13) to talk to us. When we fly, swim, or fall down in our dreams, it has a (14) meaning. Lots of doctors help people (15) their dreams. They find that dreams tell us about our (16) and fears.

These days, many scientists (17) that dreams are very important. During the day, we have many (18) , and our brain receives a lot of information. When we dream, our brain (19) information that is not important, and puts the most important information into our (20) . As we learn more about the brain, we may find answers to our questions about dreams.

16().

A.hopes 

B.rights 

C.positions 

D.abilities