She . . . . . . . . be very silly at times.
A. can
B. could
C. must
D. ought to
Answer: Option B
Solution(By Examveda Team)
Both 'can' and 'could' are modal verbs that refer to 'a possibility', 'ability' or 'capacity'. 'Can' refers to a general truth or something that has a strong sense of possibility. 'Could' refers to something that has a weak possibility, or something that might happen, but is not necessarily a general truth. Hence, 'could' is the suitable answer here.Related Questions on Grammar
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