In crowded places like airports and railway stations, you take care of your luggage.
Some students are afraid of the teachers ________ strict with students.
--- How is your English study? --- Not bad. But I ______ learning English grammar.
These words ______me ______the old days.
--- It’s a fine day today. Shall we go swimming? --- ______ .But we need to be home before six o’clock.
Some people won’t realize the importance of their health _____they have lost it.