----How long do you watch TV?----I watch TV_______ every day.
Although advertisements enable _________ to make decisions quickly, they sometimes cause lots of trouble.
Over 20 countries joined to search _________ Flight MH370 in the southern Indian Ocean.
Nowadays many parents make their children study various subjects _________ weekends.
New Year’s Eve is always _________ noisiest night throughout China.
Now the senior people in our country live a happy life.Which of the following is correct for the underlined word in the sentence?