Which aspects are included in English Subject Key Competency（）
A. language competence
B. cultural character
C. thinking quality
D. learning competence
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Although the mission was meant to be kept a secret, it ____（）
A. reveal
B. revealed
C. reveals
D. was revealed
By the time you get back, I__ all the work（）
A. would finish
B. will have finished
C. has finis
D. had finished
With his hard work, John ____ the basic knowledge of computer（）
A. has caught
B. has acquired
C. has required
D. has acknowledged
Tetrachloromethane, CCl4, is a（）
A. polar molecule with polar bonds
B. polar molecule with non-polar bonds
C. non-polar molecule with polar bonds
D. non-polar molecule with non-polar bonds
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