You needn’t have come in person — aletter _____enough

I need to advertise for a second-hand mountainbike.— _______David just plans to sell his present one.

Millie has two friends. One is from England and ______ is from the USA.

We can ________ with each other by e-mail with the help of the Internet nowadays.

Anna, must I return the book to you today—No, you . You can read it for another two days.