| A．should control | B．should be controlled |
| C．must be controlling | D．can be control |
| A．it must rain | B．it must have rained |
| C．it must be rained | D．it must have been rained |
| A．will fail | B．would miss | C．should fail | D．shall miss |
| A．to take | B．taking | C．take | D．took |
| A．ought to close | B．out to be closing | C．ought to be closed | D．ought to closed |
| A．the | B．a | C．/ |
| A．do | B．to do | C．doing |
| A．my | B．me | C．I |
| A．to | B．too | C．for |
| A．a | B．an | C．the |
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