1 . The outside and inside of the stinky tofu exist as two extremely different worlds. Perhaps that is____________ makes it such a tasty dish. (用适当的词填空)

2 . As far as I can recall from my childhood memories, a shop was __________ one could buy soy sauces and vinegar.(用适当的词填空)

3 . Our relationship to them is one of pupils to teachers and that is __________ it should be. (用适当的词填空)

4 . The idea is__________ a driver with a valid driving licence in his own country can drive freely in another country without going through another driving test. (用适当的词填空)

5 . He always participated to the best of his ability in whatever they were doing. That was___________ none of the children thought it unusual that David had decided to join the cross-country team. (用适当的词填空)

6 . What is the question? How are the rising food prices affecting ordinary people? （用名词性从句合并句子）
→_____________________________________________________________________________

7 . I wanted to be sure everything was perfect. That is ____I double-checked the address on the electronic order. (用适当的词填空)

8 . ---Sir, I feel it complicated to apply to a university abroad.
---Why not read our guide? This is ________ the relevant information is available. (用适当的词填空)

9 . One of the major reasons why children now are at greater risk is ________ they’re getting fatter.（用适当的词填空）

10 . Bill Cunningham was an observer, and not one of the observed, a worker not a star——and this was _______ he wanted it. (用适当的词填空)