[ Grammar ]
Many countries in the world ______ wind power on a commercial basis today.
A. used
B. will use
C. are using
D. uses
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Grammar › ViewHe ___ a lot of questions during the lesson.
A. ask
B. asks
C. asking
D. asked
Noun, Adjective, and Adverb Clauses › View
Because her son was late getting home, his mom was worried about him.
A. noun clause
B. adjective clause
C. adverb clause
Vocabulary and Grammar › ViewPeople _____ in a hotel.
A. Live
B. Stay
Geography › View
What is the time difference between longitudes?
A. 4 minutes
B. 6 minutes
C. 1 hour
D. 10 minutes