A sudden change in temperature _______ to bring rain or snow.

--Did you watch the football match last night?--No, there was something wrong with my TV and it couldn’t ________ any programs.

The tower clock was ________ eleven when I was walking towards home.

London is a most beautiful city, ________ the River Thames.

When you are confused about some words in reading, you can ______ the dictionary.

After having some alcohol, drivers tend to       speed when passing streets with less people.

.Manufacturers should have professional productivity and technical knowledge to ______ the quality of the products. 

---Do you know what WWF______ ?----Yes. That’s World Wide Fund for Nature.

In developed countries, farm workers _________ only a small section of the population. 

Science and technology __________ nowadays in our socialist construction.

The disaster-stricken village was inaccessible ___________ by helicopter, and the storm added to the rescuers’ difficulty.

Car dealers also have a tough time in bad economy. Therefore，they have to ________ their business model to overcome the difficulties.

Warm­blooded animals live an active life even in freezing winter，which helps them to ________ their normal body temperature.

Traditionally, Chinese people _______ the Chinese characters Double Happiness and stick them onto walls or doors for weddings.     

To my surprise, at yesterday’s meeting he again            the plan that didn’t sound reasonable.

When you keep your promise, no matter how much effort (努力) it takes, you will be       .

—What shall I do if I meet a word that I don’t know?—If you can’t guess its meaning, you can            the dictionary.

You might            those fireworks, Jane. Do be careful with them.

After he was promoted to the present position, he is not so hardworking as he ______. 

What actually ______ the accident has not yet been determined.