Great attention must be paid _______ welfare, especially in the poor area.
— She looks very happy. She __________ have passed the exam. — I guess so. It’s not difficult after all.
The biggest problem for most plants, which ___ just get up and run away when threatened, is that animals like to eat them.
In crowded places like airports and railway stations, you __________ take care of your luggage.
The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.
The weather turned out to be fine yesterday. I __________ the trouble to carry my umbrella with me.