They do eye exercise twice a day,so ( ) of them ( ) glass

They do eye exercise twice a day,so ( ) of them ( ) glass They do eye exercise twice a day,so( )of them( )glasses. ______students exercise twice a day A No B Not C No of D Not 第三题 是both of them 还是 so do they ? They often do a lot of exercise in the g___ exercise的用法,Do you do eye exercises every day?这句话中的“exercise do eye exercise什么意思 They exercise a lot every day They exercise two hours a day.(对划线部分提问) _______ ________ do astronauts must exercise for ( ) every day in space so they Do you drink water every day?It's good to drink a glass of w It is___for us to do eye exercise every day.(need) 是needed么