2018-2019学年英语新导学北师大版必修三课件:Unit 9 Period Six
2018-2019学年英语新导学北师大版必修三课件:Unit 9 Period Six第5页

4.I (design) five or six different cars so far. 5.I (build) a new car with a team from Queensland University.

have designed

have been building