The boy was so tired that he fell asleep _______ his mother could take off his clothes.
—How about your travel? —You can hardly imagine what difficulty we have had ___________ the vast desert.
Hissisterlefthomein1998,and_________since then.
Thepoliceman’s_________trafficdirectionsmadeallthedriversquite ___________.
The president is talking on ____ phone with astronauts in ____ space.
The chief editor demanded that the article _________ immediately.