The number of people in the world ______ about 6 billion and large quantities of waste ________ each year.
All the travelers _____that they should bring their ID cards with them.
There is a big dog _______to a fence outside the house.
The fog was so heavy this morning that drivers could hardly ________ the things just ten meters away from them.
This is the most serious and worst situation ___ I have ever experienced as a fan of the NBA. A. which B. that C. whenD. where
--- She should have been warned of the danger before she carried out her traveling plan. --- ______, but she wouldn’t listen to me.