Answer:
theirs, make
Step-by-step explanation:
In the line "Theirs not to make reply", the stress falls on the second syllable of "Theirs" and the first syllable of "make". This means that these two syllables are the pair of stressed syllables in the excerpt.
In poetry, stressed syllables are emphasized to create rhythm and meter. The emphasized syllables are typically indicated by a forward slash (/) and the unstressed syllables are indicated by a backward slash ().
In the line "Theirs not to make reply", the emphasized syllables are "theirs" and "make", which create a stressed pattern in the line. This pattern helps to create a sense of urgency and command in the poem, emphasizing the duty and obedience of the soldiers in the face of danger.