--- Mr. Lee wishes to see you. --- _____ him in.
| A．Take | B．Lead | C．Point | D．Show |
Life is like riding a bicycle. ________ your balance, you must keep moving.
| A．Keeping | B．To keep |
| C．Keep | D．Having kept |
________ 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 |