—What’s up? You look down. —I have piles of papers ________, but I type so slowly.
________you have learned to respect others, you will find it easy to be respected.
The man in front of me came to _______a sudden stop ______I almost ran into him.
_______you worked late yesterday, you need ’t have come this morning.
This book teaches us how to analyze _______is causing the stress in our lift.
Martin drove along for more than one hour _____he found a convenient parking place.