You must remember _________ after drinking.

A. not drive
B. to drive
C. not driving
D. not to drive

Thank you for ________ so much advice.

A. give
B. to give
C. giving
D. gives

That's ______ most accidents happen.

A. why
B. how
C. what
D. because

________ that the locks on all doors of your apartment are changed when you move in.(确保）

You can't _______ if you go on like that.(通过）

Remember to ___________ the tap.(关）

It ____________ that the driver drank too much wine.(报道说）

You should __________________ the traffic lights and the traffic signs on the road.(注意）

Which sentence is the topic sentence?

A. Consumers concerned about the hazards of noise can reduce noise pollution in many ways.
B. They can purchase noisy products such as garbage disposals and lawn mowers with reduced noise levels.
C. They can also use sound absorbing materials in their home.
D. Carpeting can be installed instead of hard flooring, and cork and fabric can be used in rooms that tend to be noisy.
E. Also, people can become less noisy themselves.
F. They can learn to avoid shouting, to close doors without slamming them, and to play radios, TV, and stereos at moderate levels.

Which sentence is the topic sentence?

A study at one prison showed that owning a pet can change a hardened prison inmate into a more caring person.
B. Another study discovered that senior citizens, both those living alone and those in nursing homes, became more interested in life when they were given pets to care for.
C. Even emotionally disturbed children have been observed to smile and react with interest if there is a cuddly kitten or puppy to hold.
D. Animals, then, can be a means of therapy for many kinds of individuals.