Question

1.—The students talked and laughed,but when the teacher came into the callsroom,

they __ their lessons.

A.stopped to do B.stopped doing C.stopped D.stop to do

2.—Who taught her French?
—___! She leaned it by herself.
A.Noboday B.Anyboday C.Somebody C.Everybody

Answer 1

1.A； stop to do sth 表示停下手头中的事去做另一件。而前面第一句用的是过去式，所以这里的stop也要用过去式。
2.A。这句后面已经有了解释了，她是自己学习法语的，所以显然没有人教她学习，即nobody

Answer 2

1.A 2.,A