The chairman thought _____ necessary to invite Professor Smith to speak at the meeting.
How come you stepped into the lab with your shoes on? You’re ________to take them off before you enter it. I told you so.
She got stuck in a traffic jam on the way, or shedinner with us now.
—Seered handbag on the table? Is that yours? —No.Mine ispink one
She gave me half, and _____the other half for her husband
Feathers are very light,we say "as light as a feather".