-There ______ many trees at the foot of the mountain.
--But now they are slowly disappearing because of human activities.
A.is used to
B.used to
C.used to be
The stone bridge ________ was built in Song Dynasty was repaired last month.
A.that B.when C.where
–What do you think of the talk show last night?
--I didn’t watch it.I ______ mum with some chores.
A.helped B.was helping C.have helped
It’s well-known that learning English well _____ time and efforts.
A.requires B.wastes C.takes
Do more exercise, _____ you’ll have a strong body.
A./ B.or C.and
Look! ______ sweet smile the little girl has!
A.How B.What a C.What
