题目内容：
Schaefer found a way of how to make ice crystals__________.参考答案：
答案解析：
单选题：Schaefer found a way of how to make ice crystals__________.
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Ryan， with the help of others， is fulfilling his dream of he
Ryan， with the help of others， is fulfilling his dream of help African people to
根据以上短文和选项，回答题Paragraph 2__________
根据以上短文和选项，回答题Paragraph 2__________
Recent studies have shown that the stature of male Americans
Recent studies have shown that the stature of male Americans has scarcely change
They voted to abolish the office of second vice-president.
They voted to abolish the office of second vice-president.
请在（49）处填入最佳答案
请在（49）处填入最佳答案