There is no doubt _______ my friend is not satisfied with what they have done.

The lady in the sitting room be over sixty. She looks so young.

Due to the widespread ________ of this medical technology, more diseases can be discovered and treated at an early stage.

― How do you feel when you watch the national flag go up?― It makes me ________ very proud.

It is very _______ of you to speak in front of all those people .