What a mess! You need to clean the classroom ________ after school!—-But the final exam is approaching!

It was_____ of you to share your food with me.—That’s all right.[ ]

We sat there, ___ with what we listened to.

English is spoken____ a second language in many countries. Many Chinese learn it ____ differentways.

It ______ at the crossroads ______ he was killed in the accident the other day.