＿＿＿＿Sunday, the students are at home.
| A．Being | B．To be | C．It is | D．It being |
The traffic rule says young children under the age of four and ___ less than 40 pounds must be in a child safety seat．
| A．weighing | B．weighed | C．being weighed | D．to weigh |
Mass media questioned the ____ of the information in the report．
| A．accuracy | B．advantage |
| C．administration | D．approach |
One in five humans ___access to safe drinking water by 2080．
| A．is said lacking | B．is said to lack |
| C．are said to lack | D．are said lacking |
It is hard to imagine what I ___today if I hadn’t been admitted to Nankai Middle School 15 years ago.
| A．would have done | B．will do |
| C．am doing | D．would be doing |
Not until they left school ___how much their teachers loved them and helped them．
| A．they realized | B．did they realize |
| C．they had realized | D．had they realized |