  We build HI absorption spectra towards Supernova Remnant (SNRs) G16.7+0.1 and
G15.9+0.2 using the THOR survey data. With the absorption spectra, we give a
new distance range of 7 to 16 kpc for G15.9+0.2. We also resolve the
near/far-side distance ambiguity of G16,7+0.1 and confirm its kinematic
distance of about 14 kpc. In addition, we analyze the CO (J=3-2) spectra
towards G16.7+0.1 and find obvious CO emission at the 20 kms$^{-1}$ OH 1720 MHz
maser site. This supports Reynoso and Mangum (2000)'s suggestions that the
velocity difference between the maser and southern molecular cloud is caused by
the shock acceleration. We discuss the impact of the distances on other
physical parameters of the two SNRs.
