Page 264 - Benchmark-01
P. 264

Build Language: is -ing









      Read and complete the sentences.








                                                                                           singing
                                                                    is
        1. The bird _________ _________.


                     (sing)











                                                                                       is
                                                                                                                 flying
        2. The butterfly _________ _________.


                     (fly)















                                                                                                                                                          Unit 11 | At the Pond
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