【C12】
A. hit
B. led
C. took
D. struck
结肠癌的标志
AFP
B. CEA
C. PSA
D. CAL25
E. CAL5-3
Tile necklace has 96 pieces and they are worth, individually and______a lot of money.
A. wholly
B. joindy
C. collectively
D. completely
What does the word "murky" (Para. 3) probably mean?
A. Unclear.
B. Significant.
C. Obvious.
D. Exaggerated.