This mobile phone he bought yesterday is the same ______ mine.
A. as
B. than
C. to
D. over
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There ______ be something wrong with your computer.
A. have to
B. has to
C. should
D. must
You ______ smoke in class.
A. don’t have to
B. must
C. mustn’t
D. have to
If you want to study abroad, you ______ learn English well.
A. must
B. have to
C. don’t have to
D. mustn’t
( )是自动气象站设备管理、使用、维修等各项工作的基础。
A. 安装
B. 软件操作
C. 常规维护
D. 故障处理