How long do you think the computer company brings out a new product?

Must we send our plan this week?— No, you ______.

Mary needs ________help. Let’s go and help_________.

It’s 12 April today. Have they found any useful information about the plane’s black box?—Flight MH370? Yes, but it’s difficult to decide where the black box really is.

_______ is the Yellow River,5,300 kilometers or 6,300 kilometers?—5,300 kilometers, I think .[ ]