You should ________ on the right when you commute in Vietnam.
The correct answer is A. drive. "Should" is a modal verb followed by the base form of the verb (infinitive without "to").
________ does it take to go from Ha Noi to Pleiku by plane?
The question asks about the duration of the trip. The correct answer is C. How long.
Be careful when you drive on ________ roads.
"Bumpy" means uneven or rough, which is a common hazard when driving. The correct answer is D. bumpy.
If people ________ the rules, there will be no more accidents.
"Obey" means to follow rules or laws. The correct answer is C. obey. While "follow" can also be used, "obey" is more formal and appropriate in the context of rules.
You should ________ right and left when you go across the road.
"Look" is the correct verb to use when checking for traffic. The correct answer is B. look.
Hurry up or we can’t ________ the last bus home.
"Catch" means to get on a bus, train, etc., before it leaves. The correct answer is D. catch.
When I was at primary school, I went to school ________.
"By foot" is the correct idiom for walking. The correct answer is B. by foot.
Public ________ in my town is good and cheap.
"Transport" refers to the system of vehicles, such as buses and trains, used for traveling. The correct answer is D. transport.
When there is a traffic jam, it ________ me a very long time to go home.
"Take" is the correct verb to use when talking about the time required for something. The correct answer is A. takes.
Yesterday Richard and Peter ________ round West Lake. It took them an hour.
This sentence describes an action completed in the past. Therefore, the past simple tense is needed. The correct answer is D. cycled.
Cyclists and motorists have to wear a ________ when they ride.
The most appropriate answer here is helmet. While other protective gear might be worn, a helmet is the essential and legally required item for cyclists and motorcyclists in many places. So, while not strictly from the previous exercise, if you are to add a word it should be helmet.