( ) 12. He needs one more stamp before his collection __________.
| A．has completed | B．will complete | C．has been completed | D．is completed |
Accustomed to ______ the steep mountain, he had no difficulty reaching the top.
| A．climbing | B．climb | C．having climbed | D．have climbed |
The head office of the bank is in Beijing, but it has ___ all over the country.
| A．companies | B．branches | C．organizations | D．businesses |
“ Have you visited the Science Museum?”
“ No, but I really wish I ___.”
| A．had | B．did | C．have | D．will |
You _________to the meeting yesterday. What was the reason for your absence?
| A．had come | B．came | C．would have come | D．should have come |
Without electricity human life _____ quite different today.
| A．is | B．will be | C．would have been | D．would be |