From your book: Update Then Check
Find the missing unit

Help me place the message clues before and after the adult correction.
Read together: Terry sends 21°C; Gus passes it. The update drops °C. An adult corrects it and repeats the test.

From your book: Update Then Check

Help me place the message clues before and after the adult correction.
Read together: Terry sends 21°C; Gus passes it. The update drops °C. An adult corrects it and repeats the test.
