The key answer of exercise 57.1
The key to exercise solutions in chapter Unit 57 - Verb + -ing or to ... 2 for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press
Question
Put the verb into the correct form.
Answer
- to keep
- to reach
- knocking
- to put
- to concentrate
- asking
- calling
- to remember
- restarting
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