Without friendship, one won’t be happy _____ he is very rich.
The poor little girl was _________young to know ______________ when her parents suddenly died in an accident.
They walked around the city to ____________ money for the children in disaster-hit areas after the terrible earthquake in Mexico.
—I want to know if I _______________smoke here. —No, you ______________. Could you see the sign “ No Smoking” there?
—It’s said that the famous scientist will give us _________advice on maths study. —__________good news! I’m not good at it.
We felt ______ impossible to finish the work without help.