重难题型组合训练(一)
C
A
D
B
C
A
D
B
A
C
B
C
A
D
B
A
B
D
No./No, he didn't.
Li Shizhen (He) used to help his father (in his medical practice)
(when he was young)．
(For)Twentyseven(27)years./He spent twentyseven(27)years(in)
writing/on Compendium of Materia Medica./It took him twenty
seven(27)years to finish writing Compendium of Materia Medica.
Yes, because I can help many patients./No，because a doctor is
always busy.(言之有理即可)
videos
an
for
myself
when
to let
finally
better
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