In the Pacific Northwest, as climate and topography vary, so do the species that prevail in the forests.
A. dominate
B. reproduce
C. rebuild
D. invade
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One of the most provocative ideas of modern physics was initiated by the British theorist P. Dirao.
A. stimulating
B. popular
C. enduring
D. powerful
I would like to fly all day in the sky if I ______ a bird.
A. were
B. am
C. was
Henry's wife wouldn't be able to go to Mary's party ________.
A. Thursday night
B. Friday evening
C. Saturday night
Why not ______ your schoolbag before you go to school
A. check
B. checking
C. to check
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