B
U
D
G
E
T
O
F
I
T
A
P
I
T
A
L
P
A
Y
M E
N
I
N
G
A P
R
B
L
N
T
E
G C C D
A I
O
W N
M
S
P E
A
R
N C
A
U R
S
E
T
S
E
B
A
T
C
P
O
O
A E
C
S
S
I
H
U
O
E
O
E
B
R
S
E
I
D
N
F
C
O
Y
R
I
N
Y
E
I
D
A
E
C
R
E
D
I
A
N
U
F
W E
D
U
D
I
N
U
L
C
T
A F
T
F
Z
E
S T
D
O L
F
A
R
E
D
D I
B
S
C K
E
T
N
U
E
W E
N
R
T
D
S
S
R C
H
A
N R
G
E
T E
Obligation and option (page 34) 1. required (not mandatory or compulsory, as these cannot be followed with by) 2. compulsory (mandatory could also be used if the helmet and equipment must be worn because of a law) 3. must (not have, as this must be followed with to) 4. have / need 5. liable (not obliged or compelled, as these must be followed with to) 6. forced (this is better than obliged or compelled, as it is stronger and suggests that the company has no other choice. Also, obliged and compelled are usually used when somebody makes somebody else do something) 7. exempt 8. Mandatory (this is better than Compulsory, as it suggests the checks must be carried out because of a law: see 2 above) 9. voluntary (not optional, as the gap is preceded by a, not an) 10. optional (not voluntary, as the gap is preceded by an) 11. alternative (used as part of an expression: We have no alternative but to‌) 12. obliged / required 13. obligation (note the adjective form of obliged / obligation = obligatory) 14. compelled (in other words, he felt that people were putting pressure on him to make him leave. We could also use obliged) 15. entail (we can also say involve) 16. need (use here as a noun) 17. essential (vital or imperative could also be used)
71 For reference see Easier English Intermediate Dictionary (0-7475-6989-4).