—It smells terrible. What has happened here?
—Look, there is much waste gas _____ from the chemical factory.
| A．pour | B．pouring | C．poured | D．pours |
If I______you，I’d work hard and make great progress in learning．
A．am B．were C．was
She writes slowly so she has trouble ______notes in class．
A．taken B．taking C．to take
All the children like the teachers_______ can understand them.
A．What B．Which C．Who
一David is outgoing．
— _____Both of them are popular at school．
A．So is Tom． B．So he is． C．Neither does Tom．
That dictionary ______ belong to Gina．Tom’s name is on it．
A．must B．can’t C．could