He had a stomachache ________ he ate something bad this morning.
---Do you know why people set off fireworks ? --- Well, in ancient China, people set off fireworks on New Year’s EVE that the loud noise could drive away bad spirits .
---She devoted as much time as she could _____________patients.---So she did.
---I often feel worried about exams. I don’t know ________________it.---Maybe you can ask your teacher for help.
Wearing red makes__ easy_ _us to take action.
--- Which do you like better, tea or coffee?--- I prefer coffee ________milk.