Though in a big city，the college student was more interested in village life.

---What happened to the house ?
---It   _____burnt to the ground.
A is said to having been           B. is supposed to have been
C is reported to have been         D. is believed to have

---________by the chemistry teacher for not finishing homework independently makes him feel very shameful.
---Yes. But he told me this morning he would spare no efforts to be the top one in our class.

Be careful when you deal with this chemical, as it will explode when ______ to sunlight.

Hours of playing violent video games can affect the way the brain works, ______ damage to certain cells of brain. 

—What if he failed in the next monthly examination again?
— I don’t know. ______ heart and be reduced _____ the class?

______ yourself, you should never put convenience before safety.

— Do you know the old man ______ on the bench over there?
— He is my grandfather.

A new way of teaching _____ in the article can make learning easier.

＿＿＿early for his date, Mark spent time reading the newspaper