The accident happened ______ a cold winter morning.[ ]

Do you like your new teacher?—Of course.She is friendly_____ us. [ ]

.How long do you think______ the construction company finishes the project?

The presidents of China and Russia had ____ interview a short time ago.—And it was ____ great success.

is he?–He is PSY. He sang the song Gangnam Style (《江南Style》).