| A．was being completed | B．would be completed | C．had been completed | D．had completed |
| A．is being | B．is to be | C．is | D．has been |
| A．Will you help | B．Shall you help | C．Are you going to help | D．Will you have helped |
| A．were won | B．would be won | C．would win | D．had been won |
| A．will be become | B．will become |
| C．will have become | D．will have been become |
| A．worked | B．is working | C．work | D．has been working |
| A．had fallen | B．has fallen | C．fell | D．was falling |
| A．located | B．locating | C．to locate | D．is located |
| A．when Tom comes back | B．when Tom will come back |
| C．before Tom comes back | D．that Tom comes back |
| A．did go | B．didn’t go | C．had gone | D．went |
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