_________ useful invention the computer is.–Yes, It helps us a lot.

Could you tell me — I’m not sure. Maybe next week.

Not far from the shopping mall, there was a amazing garden, _____the owner was a mean man refusingevery child to enter it[ ]

The traffic rules say drivers mustn’t drive if they are drunk, _______they will be punished.

May I ask a question after class, Sir – _________, but not during my lunch break.