_______ from space, we can find 70% of the surface of the earth _______ by water.
| A．Seeing …... covering | B．Seeing …... covered |
| C．Seen ...... covering | D．Seen …... covered |
---- Have you been here long?
---- _______.
| A．No, not very long | B．Not much long |
| C．Yes, only little long | D．No, only yesterday |
________ mud on his trousers brushes off easily.
| A．Drying | B．Having dried | C．Being dry | D．Dried |
The young lady was careful _________.
| A．not repeating her mistake | B．not repeated her mistake |
| C．to not repeat her mistake | D．never to repeat her mistake |
The bridge is so important to the people here that once ________ it must be carried out without delay.
| A．designs | B．having designed | C．designing | D．designed |
Though they had a meeting yesterday, there is still much that remains______.
| A．to solve | B．to be solved | C．solving | D．solved |