Question

if only their passports ___(5)___ be arranged (ability)

• A. can
• B. must
• C. should
• D. might

Answer 1

Answer: (A)

can

Option A is the correct answer because 'can' is used to express ability or opportunity, to request or offer permission, and to show possibility or impossibility.

In this case, it is used to state that if and only if (ability) the passport can be arranged(possibility) will they get free tickets.

Option B and C are incorrect because they are used to express importance and necessity but in this case the availability of free tickets depends on the condition of passports, but as it is conditional, they are incorrect.

Option D is incorrect because might is used as the past tense of may, but this statement refers to the future.