By the time some scientists ____ the lost towns, they ____ an awesome historical site.
| A．had found, had found | B．found, found |
| C．found, had found | D．had found, found |
It ‘s such a big room , If you don’t speak loud enough , you’ll never make yourself .
| A．hear | B．hearing | C．to hear | D．heard |
In this park , sparrows often fly down from trees to eat from visitors’hands. They are used to in this way .
| A．be fed | B．feed | C．having fed | D．being fed |
They started off at about 5 o’clock in the morning . They should there by now .
| A．arrive | B．have been arriving | C．have arrived | D．be arriving |
Have you ever been to the square was built last year?
| A．which | B．where | C．when | D．what |
You don’t have to pay for your flights ; they’re in the price of your holiday .
| A．concluded | B．held | C．settled | D．included |