Giusp mik 3 câu này 1. There are many factors contributing to air pollution. A: Air pollution results in many consequences. B: Factors contributing to air pollution are numerous. C: Air pollution is contributing to these phenomena. D: Air pollution is the result of burning forests. 2.(18) Sa Pa’s love market has become unique in the culture of the Mong and Dao ethnic groups (17) ______ a long time. Due to the distance between the villages, the market meets once a week on Sunday. On the Saturday night, guys and girls from villages come to Lao Cai (18) ______ one another. They talk, sing and (19) ______ different games according to their ethnic groups’ tradition. After the night, many couples become intimate and promise to see each other again on the following morning. Many of (20) ______ become husbands and wives in the spring. That is why the poets in Lao Cai called the market Sapa’s Love Market. The most popular Love Market in Lao Cai is organized in nowhere else but Sa Pa, where it is gaining more and more (21) ______ of not only the ethnic people but also the travelers from many places in the world. A: meeting B: to meeting C: to meet D: meet 3. She usually spends one hour riding to school every day. A: She usually studies in school one hour every day. B: It usually takes her one hour to ride to school every day. C: She usually goes to school by bike once a day. D: It took her one hour to go to school by bike.