Vol 1 - test 2 - section 4

[@ThùyLinhNuyễn]

31. traffic flow
32. rush
33.random
34.time
35.cost-effective
36.smaller areas
37.E
38.F
39.A
40.B

[@quynhnguyen-bk6mg]

31- traffic flow
32-rush
33- random
34-time
35-cost-effective
36- smaller areas
37- E (without rush)
38- F (not selling quickly enough)
39- A (cost more)
40- B (greater profit)