Look at this question:
The traditional goal of science is to descover how things are, not how they ought ( ).
a. are b. to c. to be d. can be
The book says the answer is c. Why not b?
C is the correct answer. The meaning is equivalent to "not how they should be".
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C is the correct answer.
The meaning is equivalent to "not how they should be".
The traditional goal of science is to discover how things are, not how they
ought to be.
should be.
could be.
will be.
were.
These are five possible endings that match "they" to "things".