[填空题]A day has 24 hours. ______ 24 hours in a day.

[填空题]A day has 24 hours.
______ 24 hours in a day.

[单项选择]First designated in 1970, Earth Day has become an annual international event ______ concerns about environmental issues such as pollution.
A. dedicated to raising
B. dedicated raising
C. dedicates to raise
D. that dedicates to raising

[单项选择]Children can spend hours a day looking at computer screens and other digital devices. Some eye care professionals say all that screen time has led to an increase in what they call computer vision syndrome.
Nathan Bonilla-Warford is an optometrist in Tampa, Florida, with VSP, Vision Service Plan, a big insurance provider. He says he has seen an increase in problems in children. "I see a lot more children who are coming into the office either because their parents have noticed that they have headaches or red or watery eyes or discomfort, or because their prescription, their near-sightedness, appears to be increasing at a fast rate and they’re worried."
Dr. Bonilla-Warford says part of the problem is that children may be more likely than adults to ignore early warning signs. "Even if their eyes start to feel uncomfortable or they start to get a headache, they’re less likely to tell their parents, because they don’t want to have the game or the computer or whatever taken away."A. All the screen time.
B. Their parents have noticed that they have headaches or red or watery eyes or discomfort.
C. Their prescription, their near-sightedness.
D. They are worrie

[单项选择]

You have studied hard, and the day has (21) come when you must write your exam. Try to arrive a few minutes before the (22) starts. Avoid talking to other students, especially those (23) are doing some last minute cramming. These people will make you nervous and (24) your concentration.
If you can, choose a seat that allows you to (25) . Try to sit away from the (26) to the room so you are not (27) by students leaving before you are finished. Listen (28) to any verbal instructions from the teacher or any (29) written on the board.
Here are five (30) for taking exams:
1. Catch your (31) ;
2. Read the (32) very carefully;
3. (33) through the test;
4. (34) your time;
5. Attack the (35) .

25（）
A. reduce
B. listen
C. be quiet
D. concentrate