The best way to explore _______ countryside is on _______foot.
--Did you like your trip to Xi’an during the Summer vacation?--____. It was too hot and there was too much traffic.
She couldn’t find her son she had dropped him off.
I told them not everybody could pass the test, ____?
--When shall we start the reconstruction of the old buildings?--Not until by the local government.
The man has been in____ doctors describe as a vegetative(植物的) state for six years.