______ into many languages, the book is popular in many countries.
| A．Being translated | B．Having translated |
| C．To be translated | D．Having been translated |
—Where is our English teacher?
—She is in the classroom, _____ the exercises _________ the students have done at home.
| A．explaining; / | B．explaining; for |
| C．explained; to | D．explained; from |
Tom does speak Chinese well, but his reading and writing skills leave much _______.
| A．to improve | B．to be improved | C．improving | D．improved |
To get an education, _______.
| A．working hard is very important | B．working hard is needed |
| C．one must work hard | D．it is needed to work hard |
That gas pipeline project, _____in July 2002 and__________in 2005, will be China’s longest gas pipeline in history.
| A．starting; completing | B．started; to be completed |
| C．to start; completed | D．starting; completed |
We saw new houses_____wherever we went on our visit.
| A．built | B．being built | C．building | D．to build |