She spent four weeks which she could afford _______ around the country, promoting her new album.
| A．to tour | B．toured | C．touring | D．having toured |
I _______to go shopping that Saturday, but the bad weather made me change my mind.
| A．plan | B．would plan | C．had planned | D．have planned |
---______ the farmers discovered the entrance to the secret cave in the valley?
--- Totally by chance.
| A．When was it that | B．How was it that | C．How it was that | D．When it was that |
One more month, _______ the grapes in the yard will be ripe.
| A．or | B．otherwise | C．but | D．and |
_______these coins are of different shapes, sizes and colors, they all date back to a long, long time ago.
| A．Since | B．Unless | C．Once | D．While |
When _______ about their opinion of the effect of modern equipment on their performance of tasks, many young people gave a positive response.
| A．asked | B．asking | C．being asked | D．to ask |