1. must
2. should
Хотя в первом случае можно взять и have to
17) c
18) d
19) b (но это не точно)
20) e
21) a
22) c
23) a (но это не точно)
Ex 1.
1) whose
2) who
3) who
4) which
5) whose
6) whose
7) which
Ex 2.
1) (Bob...feelings) Insensitive.
2) (The...department) Ambitious.
3) (He...day) Hard-working.
4) (That...doing) Has no common sense.
5) (His...sense) sensible.
6) (people...feelings) Reserved.
7) (She...abilities) Self-confident.
Ex 3.
1) A.
2) A.
3) B.
4) A.