We'll _______ get up early every morning_爱下问搜题

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问题选择题

We'll _______ get up early every morning.

A. must
B. have to
C. can
D. may

答案

答案：B

判断题

CD-ROM光盘具有容量大、成本低、可靠性高、易于长期保存等优点。( )

问答题简答题

煤层和围岩的透气性对煤层瓦斯含量有什么影响？