It’s not safe(安全的) for an ________ child to swim in the river.
Dear students, please read every sentence carefully. ______ you are, ________ mistakes you’ll make.
Who teaches ___ English? No one. I teach _____.
____ mothers can’t go to the meeting, because they have gone to Beijing.
It’s an important decision for you, so______ your time and think it over.
The song made my father ________his childhood.