【单选题】
When checking in, you need to show your ticket and ______.
【单选题】
When I saw Mary , she __________ on the piano.
【单选题】
When I saw Mary , she _______on the piano.
【单选题】
When he was a boy, he used to go there and watch ____.
②
bicycles to be repaired
③
bicycles being repaired
【单选题】
When I saw Mary, she ___ on the piano.
【单选题】
When we drove to the country, we saw many _____.
【判断题】
When winter comes, the weather is colder and colder.
【单选题】
Scarcely ________ in their seats in the cinema when the film began.
【单选题】
My friend_______when I came in.
【单选题】
When I get to the top of the building, the sun [填空].