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 |
There is no doubt they will give me a hand if I have any trouble.
| A．which | B．that | C．whether | D．when |
There is still much to discuss. We shall, ______, return to this at our next meeting.
| A．so | B．however |
| C．because | D．Therefore |
Dr Yuan Longping grows _____ is called super hybrid rice, _____ has a high output.
| A．what; which | B．that; what |
| C．that; which | D．what; that |
---Do you want to come with us?
---No, I would rather ______ at home than _____ with you.
| A．to stay; go | B．to stay; to go |
| C．stay; go | D．stay; to go |
Only when it is hungry ______ a human being.
| A．a lion will attack | B．a lion should attack |
| C．will a lion attack | D．should a lion attack |