If you want to get a better feeling for how the city is laid out, you _____ walk downtown and explore the waterfront.
should | can
Hiking the trail to the peak _____ be dangerous if you are not well prepared for dramatic weather changes. You _____ research the route a little more before you attempt the ascent.
can; should
When you have a small child in the house, you _____ leave small objects lying around. Such objects _____ be swallowed, causing serious injury or even death.
shouldn't | mustn't; can
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