| A．has broken into, has been stolen |
| B．had broken into, had been stolen |
| C．has been broken into, stolen |
| D．had been broken into, stolen |
| A．has lost; don’t find | B．is missing; don’t find |
| C．has lost; haven’t found | D．is missing; haven’t found |
| A．to | B．for | C．with |
| A．letter | B．card | C．letters |
| A．does | B．do | C．to do |
| A．How much | B．How | C．How many |
| A．leave | B．to leave | C．leaving |
| A．a | B．an | C．many |
| A．they | B．their | C．them |
| A．are | B．is | C．am |
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