Mr. Smith works as a government official now, but he ______ in a middle school for 5 years.
Children, in my opinion, ________ creative ability is unthinkably rich, ________ is seldom taken notice of by us, should be trained in that area.
A warm thought came to me ________ I might help wash my mom’s feet on Thanksgiving Day.
--Have you got a digital camera? ---No. ---You should buy________.
________ for the fact that she broke her leg, she might have passed the exam.
Mr. Smith is always on time for everything. How ________ it be that he was late for the flight?