Question:

Ultrasonic waves _____ able the bats to locate objects .

Ain

Bdis

Cun

Den

Answer:

D. en


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Use the prefix and suffix - forget:

Add a prefix to get the opposite meaning of the word 'Grace'

In which of the following words ' en ' - is not used as a prefix ?

Everyone was watching me and I felt very ________-conscious.

The word in which 'un' is not a prefix is