I find it very hard the question.
| A．to answer | B．answers | C．answering | D．answered |
When the teacher came into the classroom, the students .
| A．stop to talk | B．stopped to talk | C．stopped talking | D．stop talking |
This room is much _________ than that one.
| A．big | B．bigger | C．biggest | D．the biggest |
I had tomy little sister when my mother was not at home.
| A．look for | B．look after | C．look at | D．look into |
Elvis Presley has sold more than one records all his life.
| A．billion | B．billion of | C．billions of | D．Billions |