―Did you see Mr. Li when you were in France?―No, when I ______, he ______ to Canada.
The students hurried to the classroom ________ the bell rang.
She got up early this morning _________ she could catch the first bus.
—What about this pink skirt, madam?—This one is really beautiful. I will buy it ________it's a little expensive.
I’m sorry I’m late again________ the heavy rain.
______ regular exercise is very important, it’s not a good idea to exercise too close to bedtime.