In that school, English is compulsory for all students, but French and Russian are _______.
In the early morning, all of us stood at the top of the mountain to ________ east of the city, watching ________ burning sun rising.
Have you bought the same book ________ I referred to yesterday?
_____ to drive after drinking, some drivers are still trying their luck, which is dangerous.
— That must have been a long trip. — Yeah, it _____ us a whole week to get there.
“Drive-ins” have large parking lots _____ customers are served in their cars by waitress.