When I walked past the street, seeing the children playing happily, their happy laughter _______memories of my childhood.

.Run for more than half an hour every day, ________ you can lose your weight easily.

It’s easy ______ English and it’s important ______it.

We didn’t go home _____ we finished thework

ping’s report, ” a smile on his face, hecontinued, “_____ to several hot topics, discusses how to increase peasants’income”