The girl sitting next to me on the plane was very nervous, for she before.

Dad,mustIpractise thepianotoday?—No,you _.You may doit tomorrow.

Jack, could you help me when the plane will take off on the Internet?-I’m sorry , ,my computer doesn’t work..

Lily and I fell_____ the trees and hurt _____. [ ]

Two ______ trees have been planted along the lake since 1998.