The beautiful scenery in Switzerland is very ________to the tourists from the whole world.

 If I find someone who looks like the suspect, my          reaction will be to tell the police.

 In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.

Studies show that Americans chat on their phones for more than five hours a month, _____ Europeans.

You are___ to meet many difficulties when you are seeking success.