15. __________ made his mother worried.
| A．The child was addicted to playing computer games |
| B．The child’s being addicted to playing computer games |
| C．The child’s being addicted to play computer games |
| D．The child addicted to playing computer games |
In the countryside, ____car is not yet ____popular means for transportation．
| A．/; a | B．a; the | C．the; / | D．the; a |
It's said that going to bed early and getting up early ____a widely accepted good habit．
| A．are | B．is | C．were | D．was |
．____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
| A．It | B．As | C．What | D．That |
Medicine should be placed ____children's reach to make sure of safety．
| A．with | B．within | C．out | D．beyond |
．—I finished all my work today．
—If____, you can help others with their work．
| A．so | B．not | C．possible | D．ever |