It was about 600 years ago _______ the first clock with a face and an hour hand was made.

The issue of protecting cultural heritage was of _______ importance _______ we could not afford to ignore it.

How delicious the coffee is!—That’s right. It will taste ______ with milk.

How many people church every Sunday— Almost 500.

It was on March 11,2011 ________ a strong earthquake hit Sendai, Japan.