As early as 1647 Ohio made a decision that free, tax supported schools must be established in every town _____ 50 households or more.
| A．having | B．to have | C．to have had | D．having had |
________ all the homework assigned by the school, the students have to work at it till midnight.
| A．Completing | B．To complete |
| C．Having completed | D．To have completed |
With a great weight ________ off her mind, she passed all the tests successfully.
| A．taking | B．taken |
| C．to take | D．being taken |
________ an astronaut into space in 2003, China became the third country to send a woman into space in June, 2012.
| A．Having first put | B．To have first put |
| C．First putting | D．Being first put |
________ themselves, the employees in this company usually have a coffee or tea during their break time.
| A．Refreshing | B．To refresh |
| C．Refresh | D．Having refreshed |
For further details about our newly developed products ________ our company's website.
| A．visiting | B．visit |
| C．to visit | D．visited |