Mum, ________is my friend, Tom. Tom,_______ are my grandparents.
| A．this； that. | B．that； those |
| C．this:；these. | D．these:；those |
Mum, ________is my friend, Tom. Tom,_______ are my grandparents.
| A．this； that. | B．that； those |
| C．this:；these. | D．these:；those |
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