问题
选择题
I'm very glad I have my own room in my house. I ______ do what I want in it. [ ]
A. must
B. have to
C. need
D. can
答案
答案：D
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I'm very glad I have my own room in my house. I ______ do what I want in it. [ ]
A. must
B. have to
C. need
D. can
答案：D
导致苏俄（苏联）1921－1925年粮食产量变化的主要原因是
苏俄（苏联）1921－1925年粮食产量变化表
| 时间（年） | 1921 | 1923 | 1925 |
| 粮食产量（亿普特） | 23.13 | 34.55 | 44.24 |
C.新经济政策的实施 D.农业集体化政策的实施