[ Grammar ]
100% of frequency means …
A. Always
B. Sometimes
C. Never
D. Normally

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Science › ViewThe study of sedimentary rocks
A. Sedimentology
B. Meteorology
C. Atmospheric chemistry
D. Geology
Subject and Verb Agreement › View
Some of the vocabulary in the lesson _____ difficult.
A. is
B. are
Simple Future Tense › ViewThey __________ (not) be in London next week.
A. will
B. will not
C. not will
D. not
Grammar › View
Juan asked Betty ____ the phone.
A. answer
B. to answer
C. not answer
