It is usually warm in my hometown in March, but it _____ be rather cold sometimes.

We used to work in the same office and we____ often have coffee together, which I missed so much years later.

I was really busy these days, otherwise I _______ to your birthday party last night.

 — Listen! Is that Linda singing in the next room?— No, it ________ be her. She is still in Shanghai.

—I heard they went skiing in the mountains last winter. —It       true because there was little snow there.