The students will take morning exercise every day, _________ it rains.
Hesitating what to do, .
The retired man donated most of his savings to the school damaged by the earthquake in Yushu, _______ the students to return to their classrooms.
He spent at least as much time reading as you online yesterday.
--- Why does the lake smell terrible?---Because large quantities of water .
The book didn’t children probably because the author employed too many scientific terms in it.