某同学用显微镜观察时,若目镜为5×,物镜为10×,则物像的放大倍数是( )
A:5倍
B:10倍
C:15倍
D:50倍
I w____ to Qingdao with my parents last summer holiday. We t____a plane there. We went to the beach. It was very b ____. I like swimming very much. I s____in the sea. My mum took many p____ there. We had a good time.