________ an hour every day has made a considerable difference to my health.
| A．Having walked | B．Walk |
| C．Walking | D．Walked |
The league Secretary and monitor ______ asked to make a speech at the meeting．
| A．is | B．are | C．has | D．were |
I bought a dress for only 10 dollars in a sale; it was a real ____.
| A．exchange | B．bargain | C．trade | D．business |
_____in the office all day long, Wendy is more than tired when she arrives home.
| A．Engage | B．Engaged | C．To engage | D．Engaging |
The managers discussed the plan that they would like to see _______the next year.
| A．carry out | B．carrying out | C．carried out | D．to carry out |
_______you can easily have lunch in the restaurant around the corner, why do you take the trouble to drive many miles here?
| A．When | B．Unless | C．While | D．Where |