[ Vocabulary ]
It’s very ____, saving money and energy, to build energy-efficient buildings that don’t lose heat.
A. connected
B. risky
C. cost
D. economical
Select your answer:
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Grammar › ViewIndicate the case for each of the following pronouns. Some pronouns may have more than one case.
yours
A. nominative
B. objective
C. possessive
Grammar › View
what word completes the sentence: They______ at the library.
A. were
B. was