21．To write your report, you may refer to books 19th century Englist literature.
A．from B．in C．about D．at
22．－ Has Tom already finished his new story?
－ I Have no idea. He it last month.
A．had written B．was writing C．would write D．wrote
23．You look so tired. You have stayed up late again.
A．should B．can C．may D．must
24．The couple finally bought the house they wanted, for they enough money.
A．had saved B．were saving C．would save D．were to save