Exercise 1: Put the words containing /sk/ or /sp/ or /st/ in correct columns.
treasure | skirt | clasp | schedule | spy |
sky | cracks | atmosphere | special | ancestor |
disc | spouse | stuck | phosphate | smoke |
scissors | stand | sculpture | cyclist | stain |
least | skis | packs | snake | scholarship |
spark | hospital | speak | lips | philosophy |
psychology | request | space | scanner | spill |
/sk/ | /sp/ | /st/ |
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