The man who looked honest ________ to be a thief.
The number of various educational programs is increasing, _______ important roles have been realized by more and more people.
It is dangerous to take ________ from rain under a tree especially during a summer rainstorm.
--- What do you think of the grammar book?--- Oh, it really is ________ useful reference book, which is worth reading ________ second time.
--Mary, remember to come and see us next time you’re in town.---__________.
——Shall I give you a ride as you live so far away?——Thank you. ______.