Under ideal conditions, the entire life cycle of some insects, for example fleas, living on pets

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Mark the letter A, B, C or D on your answer sheet to indicate the word(s) that is OPPOSITE in meaning to the underlined part in each of the following questions

Under ideal conditions, the entire life cycle of some insects, for example fleas, living on pets, may only take 3 weeks, so in no time at all, pets and homes can be infested

very fast

immeasurably

unaccountably

very slowly

Giải thích

Đáp án D
In no time at all: hầu như k tốn chút thời gian nào >< very slowly: rất chậm