01: 2H
02: X (or PASS, as the J of spades is not worth much)
03: 2C
04: PASS (12 HCP, but no 5-card suit and only 2 clubs)
05: 2C
06: 2H (11 HCP and not the prettiest hearts, but nice distribution and long hearts)
07: PASS (hearts are tempting, but the spade points need to be downgraded)
08: X (too strong for 2C; with 16+ HCP, double "automatically")
09: PASS
10: 2C
11: X
12: 2D (missing a point, but have 6 diamonds)
13: 2H (or double)
14: X
15: 2H
16: 2C
17: PASS
18: 1NT (although a bit risky with weak spades)
19: PASS
20: 2C