What is the joke that the platoon leader told when he deliberately made his glasses laugh in Wonderful Tale of Youth 2?

1. A girl got her boyfriend's engagement ring the night before, but her classmates didn't notice it, which made her very angry. In the afternoon, when everyone was sitting and chatting, she suddenly stood up and said loudly, "Gee, it's really hot in here. I think I'd better take off my ring. " The hostess called the maid to the front and asked her, "Are you pregnant?" "Yes!" The maid replied. "Fortunately, you can say it. Aren't you ashamed that you are not married? " The hostess trained again. "Why should I be shy, mistress? Aren't you pregnant yourself? " "But I am pregnant with my husband!" The hostess retorted angrily. "Me too!" The maid agreed happily. 3. Motorcyclists like to wear clothes backwards, that is, buckle their mouths at the back to keep out the wind. One day, he drove under the influence of alcohol, overturned and fell headlong on the side of the road. Here comes the policeman: Policeman A: What a terrible car accident. Policeman B: Yes, I hit my head in the back. Policeman A: Well, he's still breathing. Let's help him turn his head back. Policeman B: OK ... One, two, push, turn around. Policeman A: Well, I'm not breathing ... 4. On a winding country road, there are often some ghost stories because of frequent car accidents. One night, a taxi driver saw a long-haired shawl on the roadside, and a woman in white waved to him. Because the driver had never seen a ghost, he boldly stopped to let her get on the bus. On the road, although the driver doesn't believe in ghosts, he is also Mao Mao in his heart. The driver got a fright and stepped on a brake! I saw that the woman's face was covered with blood and her expression was ferocious. The driver's teeth trembled with fear. Suddenly the woman said, "Can you drive? I bowed my head to tie my shoelaces, and suddenly you broke my nose by braking ... "5. A patient went to see a doctor, who examined him and frowned and said," You are too ill, I'm afraid you won't live long. " Patient: "Please tell me, how long can I live?" Doctor: "Ten …" The patient asked anxiously: "Ten what? Ten years and ten months? Ten days? " Doctor: "Ten, nine, eight, seven, six, five ..." 6. Teacher: "Can you tell me the same characteristics of18th century scientists?" Student: "Yes, they are all dead." 7. The rhinoceros dung beetle fell in love with a mosquito. When the beetle asked the mosquito what to do, the mosquito said, "nurse, give me an injection." The tapir patted his thigh: "Fate, I was rubbing pills in the Chinese Medicine Bureau ..." 8. An African lives in a hotel. In the middle of the night, a fire broke out for some reason. Africans don't care so much when they see it, and they run out naked. When the fireman saw it, he exclaimed, "My God! It's burnt, and you can run so fast! "