That's ______ most accidents happen.
A. why
B. how
C. what
D. because
查看答案
________ that the locks on all doors of your apartment are changed when you move in.(确保）
You can't _______ if you go on like that.(通过）
Remember to ___________ the tap.(关）
It ____________ that the driver drank too much wine.(报道说）
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