A) open B) opening C) being opened D) opened
All the people assembled at Marys house.
Active language learners seize every opportunity______________
A. to discover sentence patterns and grammatical rules
B. to expand vocabulary
C. to use the target language
D. to encourage unsuccessful language learners to learn independently， actively and purposefully
E. from clues
F. to say strange things
According to the passage, in operating airlines it is essential to
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