16. We are looking for types of vehicles that help us to avoid ___________. 
A. walking B. traffic jams C. rush hours D. road 
17.  Nam: “Let's clean the street on Sunday mornings.”        - An: “__________” 
A. Thank you B. That’s a good idea C. Not at all D. Good job 
18 .At this time next week, we ____________ a wind turbine in our garden.  
A. install B. installed   C. will install D. will be installing 
19.___________ does it take you to get to Ho Chi Minh City by plane? - About 2 hours.  
A. How far    B. How much C. How long D. How many 
20.A __________ is a film that tries to make audiences laugh. 
A. sci-fi B. documentary C. comedy       D. horror