1.3 Listen to Rob. Mark the sentences T (true) or F (false).

Solution:

Based on the image, the sentences are about Rob and Victor being best friends. Since there is no audio or further context provided to determine the truthfulness of the statements, we cannot mark them as T (true) or F (false). However, the title 'Best friends' and the image of two boys playing together suggest a friendly relationship.

Note: To accurately mark the sentences as true or false, the audio corresponding to exercise 1.3 is required.