你应该在出门前检查一下天气预报。

You ___should check the weather forecast before going out.

你感冒了，应该多喝水。

You ___should drink more water when you have a cold.

如果你现在出发，应该能在晚饭前赶到。

If you leave now, you ___should make it before dinner.

如果你生病了，应该早点休息。

If you feel sick, you ___should go to bed early.