The weather turned out to be fine yesterday. I ______ the trouble to carry my umbrella with me.

Can you imagine that a smart man like him ________ make such a stupid mistake?

You _____ hurt your stomach if drinking beer while having sea food.

Passengers _____ fasten their seat belts immediately after taking their seats. The belts should remain buckled during the flight whether or not the “fasten seat belt” light is on.

It’s difficult-------- me to learn English well.