When I ask him to point to pictures of particular scenes, he could pick out which scene matched the sentence當我要求他指出特定情景的圖片時，他能夠挑選出附合描述的圖片

ask to邀請(某人)參加(某活動)

We must ask you to amplify your statement.

我們得請你對你的說法作進一步的說明。

Immigration officials will ask to see your papers.

移民局的官員將要求你出示證件。

pick out挑出；辨認出

My father helped me pick out a new book.

我父親幫我選了一本新書。

Let me pick out some good ones for you.

讓我來替你挑幾個好的。

So he did very well on that task.而他完成得很好

do well 做得好； 進展情況良好

You would do well to discuss the matter with him.

你還是與他商量一下這件事為好。

You have to be highly competitive to do well in sport nowadays.

如今必須有高度的競爭意識才能在體育運動中取勝。