It was on my way back home ________ my father made a promise ________ I did well in the next exam, he would buy me a laptop.
| A．when; that | B．that; that |
| C．that; that if | D．When; that if |
What _______ public is concerned about is whether medical workers and scientists will be able to find _______ cure for this new disease after the vaccine(疫苗) is tried on volunteers.
| A．/；/；/ | B．the；the；/ |
| C．the；/；the | D．the；a；the |
You have been sitting on my hat and now it is badly out of _______.
| A．date | B．shape |
| C．order | D．balance |
She was caught in _______ heavy rain on her way to the lonely island, which was quite _______ experience.
| A．a；/ | B．/；an |
| C．a；an | D．a；a |
It is _______ world of wonders, _______ world where anything can happen.
| A．a；the | B．a；a |
| C．the；a | D．/；/ |
It is often said that _______ teachers have _______ very easy life.
| A．/；/ | B．/；a |
| C．the；/ | D．the；a |