—________ I have two tickets for the Chinese Farmers’ Painting Exhibition?
—Sorry. The tickets are sold out.
句意：——我可以买两张中国农民画展的票吗？ ——很抱歉，票卖完了。
考查情态动词。Must必须；Need需要；Should应该；May可以。根据“I have two ticketsfor the Chinese Farmers’ Painting Exhibition”可知，此处表示请求允许，用May引导一般疑问句。故选D。
—________ I have two tickets for the Chinese Farmers’ Painting Exhibition?
—Sorry. The tickets are sold out.
— ________ you let me paint the fence a little, Tom?
—Well, no, Ben. I’m afraid….
如图，用火柴棍拼成一个由三角形组成的图形，拼第一个图形共需要3根火柴棍，拼第二个图形共需要5根火柴棍；拼第三个图形共需要7根火柴棍；……照这样拼图，则第n个图形需要___________根火柴棍．
菱形ABCD中，对角线AC=10，BD=24，则菱形的高等于___________．
—________ you help me with my spoken English?
—No problem.
—______ you please take the dog for work?
—OK, but I have tofold the clothes first.
