I didn’t quite follow him because he explained the theory _____that is too abstract for me.
—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.
33.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.