He had to retire (退休) early _______ poor health.[ ]

So many problems! I’m too tired. — You should try to _____________ them by yourself. You’re not a child any longer.

Sarah is _______ a kind-hearted girl _______ she often helps people who are in trouble. [ ]

It ______ that he has been ill for a long time.

Look! The young man _____ is in blue looks like Mr. Clark.— I think so. [ ]