It is high time for us to take measures to protect these old traditions and customs before they ___.

A teacher who is just interested in his teaching but doesn’t _____ students is not a good teacher.

At first ___ , the bag seems made of real leather, but actually it is just an imitation.

 — What did he _______ when he went out? — An umbrella.

—So how is your new roommate?—She really _____. She’s always making loud noises at midnight and when I remind her,she always makes rude remarks.