25. Write the sentences in the negative. ** Ex. I did my homework half an hour ago. → I didn't do my homework half an hour ago. 166. Billy drank a cup of coffee an hour ago. 167. John translated a difficult text. 168. Bob found his keys yesterday. 169. The secretary typed a letter. 170. I sent an e-mail to my mum. 171. George drew a funny animal.

Решение:

1. 166. Billy didn't drink a cup of coffee an hour ago.
2. 167. John didn't translate a difficult text.
3. 168. Bob didn't find his keys yesterday.
4. 169. The secretary didn't type a letter.
5. 170. I didn't send an e-mail to my mum.
6. 171. George didn't draw a funny animal.