-There ______ many trees at the foot of the mountain.--But now they are slowly disappearing because of human activities.A.is used toB.used toC.used to be
Tom asked my friend ________.
You must be very tired. Why not ________ a rest?
--What were you doing at 9 o’clock last Sunday morning? --I ________.
The accident ________ a windy night last year.
--How about your English? --I found ________ hard to learn it well.