It’s polite youto say hello to your neighbours every day.

Would it be________for you to come at 9?00 am tomorrow?-Can we make it a little earlier?I have another meeting at 10?30 am.[ ]

With the situation worsening, the army threatens to_______ if a general election is not to be held as scheduled. So let’s _______some serious work.

_______ are you going to visit the sciencemuseum—Next Saturday.

Excuse me, sir. Smoking ________ in the hospital.—Oh, I’m really sorry.