`16.` It took Nam lots of time to do this experiment.

`17.` Huy spent all morning preparing for lunch.

`18.` It took John three days to visit VN.

`19.` My son spent three years studying at this college.

`20.` It takes Trung two hours to do his homework every day.

`----------------------`

`-` Cấu trúc: It `+` take (chia thì) `+` sb `+` to do sth

`->` Ai đó mất thời gian để làm gì ...

`=` S `+` spend (chia thì) `+` time `+` doing sth

`->` Ai đó dành thời gian làm gì ...

`16`. It took Nam a lot of time to do this experiment.

`17`. Huy spent all morning preparing for lunch.

`18`. It took John three days to visit Vietnam.

`19`. My son spent three years studying at this college.

`20`. It takes Trung two hours to do his homework every day.

_______________________________________________________________

`@` Cấu trúc spend :

`-` S + spend + time/money + (on) + N/something : Dành thời gian/ tiền bạc cho cái gì, việc gì.

`-` S + spend + time/money + (on) + doing something : Dành thời gian/ tiền bạc để làm cái gì, việc gì.

`@` Cấu trúc It take :

It (take) + [time] + to V : Mất bao lâu để làm việc gì đó.

CHÚC BẠN HỌC TỐT!~