The teacher asked the two students todiscuss the question in a low voice ________ they should bother the others.

Sam, can I get my umbrella back— Oh, I am very sorry. I ___________ it at home today. I will bring it to you tomorrow.

Little ______ that we were watching his every move，so he seemed to be going his own way in this business.

_____ the recent bad weather, the project is several weeks behind schedule

It was several years ________ I realized ________ David had lied to me.