$\text{Question I.}$

$\text{1. more carefully (trước đó có động từ nên sau phải dùng trạng từ)}$

$\text{2. nomads : người du mục }$

$\text{3. more  freindly (sau động từ tobe thì phải dùng tính từ)}$

$\text{4. longer }$

$\text{Question II. }$

$\text{1. My house is bigger than yours.}$

$\text{(S1+be+adj-er+than+S2.)}$

$\text{2. I am interested in listening to music.}$

$\text{(S+love+V-ing = S+be+interested in+ V-ing)}$

$\text{3. The white dress is cheaper than the black one.}$

$\text{(S+be+more adj + than+S2)}$

$\text{4. Mary is one of the most intelligent students in my group.}$

$\text{(No one + in/on/... + is + more adj/ adj-er + than S = S+ be +one of the most adj/ the adj- est + in/on/...)}$