完成句子。(每空l分，共8分)
根据所给提示，完成句子。每空一词，含缩略词。
She eats junk food once a week. (对划线提问)
               does she eat junk food?
We usually watch TV over three hours on weekends. (改为同义句)
We usually watch TV ________________ three hours on weekends.
Mary is 16 years old. Alice is 18 years old（合并成一个句子）
Mary is                  Alice.
他们登上月球的梦想终于实现了.（完成译句）
Their dream of walking on the moon_____________ at last.