We should speak ________when we meet someone for the first time.

Evidence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.

helps build a better world for everyone, especially children around the world.

How about raising some money for the homeless children — _________.

My aunt said she called you yesterday morning, but there was no answer.—Oh, we were at home. Maybe my husband with me my car in the garden.