Tim’s mother _______ angry. Because Tim_______ homework yesterday .
| A．is , isn’t doing |
| B．did, didn’t do |
| C．was , didn’t do |
| D．is , doesn’t do |
Tim’s mother _______ angry. Because Tim_______ homework yesterday .
| A．is , isn’t doing |
| B．did, didn’t do |
| C．was , didn’t do |
| D．is , doesn’t do |
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