—What led to his success ?
—He succeed _____ working hard .

--what effect does the medicine have          the blood pressure ?
--- well ,it depends         how much you take .

It was too hard for the firefighters to get close to the burning building．All their attempts to rescue the people trapped were           .

.He had a bad week. He lost his job, ________ ,his car was stolen.

They own a restaurant in Shanghai ________ a store in Hangzhou.

Medicine should be placed ____children’s reach to make sure of safety．

---It’s raining heavily. The plane may be put off. 
---I am told it will take off _______ the weather. 

Let’s look up the word in the dictionary．Do you have one_______?

Lewis was much admired ______ his work on the advanced medical research.

The girl was knocked ______ her bike by a car. She shouted ______ the driver angrily.