When he was a little boy，he ______ on the farm.

How many birds can you see in the tree? –I can seebirds in the tree.

Jack, when shall we go to visit Mr. Smith? – It’s up to him. We’ll go to see him whenever _______.

What are on show in the museum? -Some photos _____by the children of Yushu, Qinghai.

Most doctors and nurses ______ white clothes when they’re at work..