They arrived _____ Wuhan _____ a cold morning.

The United States of America _____one of the most developed countries in the world.

I soon found that the work I was doing ____ by someone else — in other words, I was wasting my time

We’ll take the conditions into careful consideration______ you have attached to this contract. —Thanks. Hope for further cooperation.

The old engineer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was________,though slow.[ ]