When you are learning a foreign language, _______, you must forget your own language

On weekend， I usually go to bed late and get up at 10 ________ the morning.

The weather was ______ cold that I didn’t like to leave my room [ ]

He was hiding behind the door _________ hecould see what was happening

Is this the first time you _____Chengdu ?—-No But the first time I _____here, the city wasn’t so beautiful