1 . I had never been to London before and it was not until I graduated from Oxford University that I could have enough time to ________ (探索) the great city（根据汉语提示单词拼写）

2 . Some users worry that they are spending so much time in _________ (虚拟的)worlds that they are becoming afraid of meeting people in the real world. （根据汉语提示单词拼写）

3 . Granny and I made sugar biscuits,_________ (填，塞) the turkey and then I sat on my granny’s lap and we sang Christmas songs. （根据汉语提示单词拼写）

4 . V________(各种各样的) of TV programmes are being broadcast on TV at present. （根据中英文提示填空）