[ Modals ]
(+) Rock climbing _________ be dangerous.
A. Must
B. have to
C. Must not
D. has to

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Electricity Vocabulary › ViewWhat is the single resistance that could replace all resistors in a circuit without changing the total current or voltage?
A. Equivalent resistance
B. Parallel resistance
C. Series resistance
D. Ohm’s law
Grammar › View
Choose the synonym of miserable.
A. unhappy
B. exhilatrated
C. exhausted
Grammar › ViewIf you look closely, you will find it.
A. if
B. find
C. closely
Vocabulary and Grammar › View
Choose the word with the correct spelling.
A. landlooked
B. landlok
C. landlocked
