Where is your mother， Jack—She is busy ____ a cake. I will have a birthday party tonight.

He is rather difficult to make friendswith, but his friendship, _____ is more true than anyone else’s.

If you go to Beijing, don’t forget to buy some Qingfeng Baozi for me. – . I also want to try the famous baozi.

My father did not go to New York; the doctor suggested that he _____ there.[ ]

How do you like the story—Interesting,_______ the end of it is not perfect.