It’s ___ time that he has failed in the experiment.However, he has made up his mind to try ___ time next week.
The tower clock was ________ eleven when I was walking towards home.
A dark cloud is a ________ of thunderstorm.
________ the Internet is bridging the distance between people, it may also be breaking some homes or will cause other family problems.
--The English exam is not difficult, is it?--________. Even Tom ________ to the top students failed in it.
London is a most beautiful city, ________ the River Thames.