I have an appointment _______ Dr.Brown,but I need to change it.
In summer, food will go bad if_________in room temperature.
.QQ, _________you can chat with your friends, makes communication easy.
_________fit, we ought to learn more about our body and be careful with what we eat.
Of all the girls, Jane spent_________time and made_________mistakes.
How_________I help them to understand when they won’t listen to me?