[ Vocabulary & Grammar ]
The factories have closed for the weekend to ________ energy.
A. preservation
B. conservation
C. conserve
D. preserve

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Mixed General Quiz › ViewNew Jersey was the third state to ratify the U.S. Constitution ___ 1787 and the first to ratify the Bill of Rights ___ 1789.
a. of; of
b. in; in
c. on; on
Relative Pronouns › View
The girl ____ brother goes with me to the gym is a good singer.
A. that
B. which
C. who
D. whose
Grammar › ViewI’ve ___ to call the internet company all morning but nobody picked up the call.
A. tried
B. been trying
Modal Verbs › View
She ___ have passed the exam.
A. must
B. should
C. would
D. may
