At the word boundary "that pen" [ðæp pen]  there is a case of ___ assimilation

The vowel [i] is checked in the word "sonic".

In the first

sense-group of a disjunctive question either the low-falling tone or the low-rising tone is used.

Listen and write the tone you hear (omit the article, the words must be capitalized) 

усечённый

трение

is a pure vowel in the articulation of which the organs of speech do not change

their position throughout the duration of the vowel.

You will hear four sentences. Now listen to THE SECOND sentence and write the number of the intonation group