7. There are 6 seats arranged in a row, and three people are to be seated, with exactly two adjacent empty seats. The number of different seating arrangements is ( ).
(A) 48
(B) 60
(C) 72
(D) 96
7.C.

Arrange the seats in order as $1,2, \cdots, 6$.
If the adjacent empty seats are 1 and 2 or 5 and 6, there are $\mathrm{C}_{3}^{1} \cdot \mathrm{A}_{3}^{3}$ arrangements each; if the adjacent empty seats are 2 and 3, 3 and 4, or 4 and 5, there are $\mathrm{C}_{2}^{1} \cdot \mathrm{A}_{3}^{3}$ arrangements each.

Therefore, the number of different arrangements where exactly two empty seats are adjacent is $2 \mathrm{C}_{3}^{1} \cdot \mathrm{A}_{3}^{3}+3 \mathrm{C}_{2}^{1} \cdot \mathrm{A}_{3}^{3}=72$.