. It used to be thought _____ the Earth was flat.
| A．as | B．when |
| C．since | D．that |
I was ________ leave ________ I saw him ________ towards me with a bag in his hand.
| A．about to；when；run | B．about to；when；running |
| C．to about；when；run | D．to about；while；run |
A new bridge will be built just at the place where the old one was ________.
| A．damaged | B．hurt | C．injured | D．destroyed |
________ the plan has been made，let's get down to ________ it out.
| A．Now that；carry | B．Because；carry |
| C．Since；carrying | D．Now；putting |
The government will force companies to ________ any possible measure to reduce air pollution.
| A．adjust | B．adopt | C．adapt | D．accept |
________ in 1993，the EU，together with the US，is one of the two largest economies in the world.
| A．Having founded | B．Founded |
| C．Founding | D．Being founded |