We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
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.