The baby couldn't stop ____(laugh)while her mothe___(sing)to

The baby couldn't stop ____(laugh)while her mothe___(sing)to She___(play)the guitar while her sister ____(sing) The young soldier really doesn"t know ____ to stop the baby I make faces to make the baby ____(laugh). ____ his mother,the baby couldn't help laughing At last, Lucy make the baby ____ and the baby began to laugh At last,she made the baby stop crying and begin to laugh.为什么 She couldn't ____ her words ____by the students. The old woman ____ and couldn't find her house. the baby stops to ——（stop）,when his mother begins to sing Seeing the picture,he couldn't help to laugh.如何改错? the child couldn't __(run) to her mother