You       trust an online shop just because it has a beautifully-designed website.

—— It's no  easy task to catch a ticket on a website that receives l billion clicks daily．一一I can’t agree with you more．There      be errors for every single step

When I was a child, I ______ watch TV whenever I wanted to.

- Someone is knocking at the door.  - It ______ be Tom. He is still in the school.

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