----- __________it be Li Ping who broke the glass?---- No. It __________ be Wu Dong who did it.
Had they known what was coming next, they _____ second thoughts.
---What do you think made her mother so angry? ---______ the exam.
----Shall we go and help them with their work? ----We’d better not. They said we’d just be ______ if we tried to help.
I wonder what it feels like to be one of ______ really rich. The Browns already have Rolls Royce and now they are buying ______ third.
Some kinds of animals can ______ the color of their surroundings.