Question

Select the option that makes the correct use of “concentrate”, as used in the
passage, to fill in the blank space.

a) A student’s duty is to ___________ on their studies.
b) The water has high chemical_____________.
c) The glue drops _____________ into a thick blob when dropped steadily.
d) The companies advertisements ____________on building their market.

Answer 1

Answer:

Answer

Explanation:

where is the passage

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