连词成句。
____
①取镜安放。
②对光：如果实验室内的光线不足，应使用反光镜中的____（选填“平面镜”或“凹面镜”）。
③放置玻片标本：将玻片放到载物台上，使要观察的物体正对____的中心。
④观察：从侧面注视 3 ____，双手缓慢转动 2 使镜筒下降，直到镜头 3 距离玻片标本2～3mm为止。注视显微镜视野内，双手徐徐转动2____使镜筒上升，直至视野中出现物像。微调5____使物像更加清晰。
用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。
hair, never, old, newspaper, play, but, can't, get, glasses, build
My grandfather is seventy years old, ____ he is still very healthy. He is tall and of medium ____ . He has short straight white ____ He likes reading. Every morning he ____ up very early and then reads morning ____ . When he reads, he always wears ____ . He also likes ____ chess, too. He always plays chess with his ____ friends. He ____ plays chess with me. Why? Because I ____ play chess.
