When I heard the joke, I couldn’t help ________. A: to laugh B: from laughing C: laughing D: to be laughing

6 Hearing the joke, everyone burst ______ laughing.

What is Norman's example meant to prove? A: Laughing is a learned behavior. B: Laughing is a good medicine to patients. C: Laughing is easier than battling with an illness. D: Laughing is something people can do without effort.

Nobody would like______because of their appearance. A: to be laughed at B: to laugh at C: to laughing at D: to be laughing at

I don’t know why ___________. A: my sister Mary was laughing B: did my sister Mary laugh C: my sister Mary laughing D: was my sister Mary laughing

We are driving to the airport with____. A: laughing B: eing laughed C: eing laughing D: have being laughed

I couldn’t help _______ when I heard the joke. A: laugh B: to laugh C: laughing D: e laughing

I couldn't help _____ when I heard the joke. A: being laughed B: laughing C: to be laughing D: to laugh

The boy can’t help ________ at this ________ story. A: laughing; interesting B: laugh; interested C: to laugh; interesting D: laughing; interested

汤姆的故事很滑稽，我们都忍不住笑了起来. A: Tom’s story was so funny that we could not keep (ourselves) from laughing. B: Tom’s story was such funny that we could not laugh. C: Tom’s story was such funny that we could not suffer from laughing. D: Tom’s story is such funny and we could not get from laughing.