CharlesSmith,______wasmyformerteacher,retiredlastyear.
B
that 不能引导非限制性定语从句 , 可以用 which 和 who 引导 , 其中 , who 代替的先行词是人。句意为：查理 ?史密斯去年退休了 ,他曾经是我的老师。
We_____knowledgefromourfamilies,schools,jobs,andthemassmedia.
Notuntilrecently_____thatThompsonhadbentellingthetruthallalong.
The professor asked a question, and David ________ a good answer.
They prefer to _______ the rest of the morning walking in the garden.
Because of the bad weather, the sports meet had to be ________.