In the 21st century, all nations must take their ________of responsibility for the global safety.
—__________ I hand in my report as soon as the class is over? —No, you needn’t.Anytime this week is okay.
The headmaster will __________ a speech to the visiting foreign guests this afternoon.
To our disappointment, the trip we had been looking forward to __________ in the pouring rain.
As you can see, we need the equipments, ___________ are necessary to make the project move on.
A lot of tents, drinking water and food __________ to the homeless earthquake survivors in the past several weeks.