41.   The custodian made his usual rounds of the building to make sure that everything was OK.

42.   Check to make sure that all the windows are shut.

43.   She ran a quick check of the computer to make sure it was working properly.

44.   Check the expiration date on the bottle to make sure the medicine is still good.

45.   Many European countries and the United States check vehicles for gas and smoke emissions to make sure the levels are below the permitted output.

46.   Every day we have battles with employers to make sure that we have decent working conditions for our members in this country.

47.   They question everybody very closely, just to make sure that they find out every tiny detail that might be useful.

48.   That includes chatting to the band throughout the day, to make sure that they are at interviews, TV sessions and record signing sessions.

49.   I want to draw your attention to all those people working behind the scenes within BNFL to make sure that this study is carried forward.

50.   Anyway, I removed his belt and pulled his trousers down and tied the legs in a knot, just to make sure.