–What is the theme about for the meeting this evening?. --No idea. Perhaps we will have to discuss the plan ___ a few days later.
To maintain a nice relationship, both sides are advised to focus on _________ they have in common.
After the disaster, the first thing the local government did was to provide _____for the homeless families.
Most scientists seem to agree that ______ certain limit should be set on _______ consumption of cars to ease air pollution.
Helen devoted herself ________to her research and became a top scientist in the field of applied physics.
Vitamin D helps our bodies make a special chemical,and this special chemical, ______ affects our brains,making us feel happy.