[ Vocabulary ]
adjective; free from error; absolutely dependable
A. infallible
B. unreliable
C. instability
D. predictable

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Grammar and Vocabulary › ViewThe planets of our solar system ______ the sun, which is a star.
A. biosphere
B. orbit
C. spacecraft
Grammar › View
He often helps other people. I ___ he is a good man.
A. think
B. thinking
C. have been thinking
D. had been thinking
Adverbial Phrases › ViewChoose the adverbial phrase in the following sentence:
Yesterday evening we took our dog for a walk and he ran away!
A. we took our dog
B. Yesterday evening
C. he ran away
D. and
E. we took our dog for a walk
Prepositions › View
My dog is sometimes noisy ____ night.
A. in
B. on
C. at
D. every
