37. The little girl cried _____ she saw the dog.
| A．every time when | B．at each time | C．immediately | D．at the moment |
Hurry up！The train________.You know it________at 8∶00 am.
| A．leaves；leaves | B．is leaving；leaves |
| C．leaves；is leaving | D．is leaving；is leaving |
Life is like a game________you play five balls in the air—work，family，health，friends and spirit.
| A．when | B．that |
| C．which | D．where |
Across all media，people are debating about________we need to keep track of every school bus on China’s road.
| A．how | B．whether |
| C．which | D．where |
Vitamin D helps our bodies make a special chemical，and this special chemical，________，affects our brains，making us feel happy.
| A．in turn | B．in particular |
| C．in advance | D．in short |
Some of us remain________at our computer for hours every day，forgetting moving our body.
| A．seating | B．seated |
| C．sat | D．sit |