完成句子。(每空一词)
They bought a house in 2012.(改为同义句)
They______ _______a house since 2012.
We ought to be polite to the old.(变否定句)
We______ _______be polite to the old.
There is something delicious on the table.(改为一般疑问句)
______ there ________ delicious on the table?
尽管他很富有,他仍然过着简朴的生活。
______ _______he is rich, he lives a simple life.