果实品质由外观品质和内在品质构成，果实的外观品质包括（）。
A、果实硬度
B、果实养分
C、糖酸含量
D、果实大小
参考答案：D
It's believed that________you work, ________result you'll get.[ ]
A. the harder; the better
B. the more harder; the better
C. more hard; more better
D. the more hard; the better
Look after your brother, please. He's very _______. [ ]
A. young
B. small
C. old
D. new
