Use the correct tense or form of the verb given in brackets

----- Nội dung dịch tự động từ ảnh -----
hat about going by bus
-Use the correct tense or form of the verb given in brackets.
16. What
17. Poisonous gases
18.I'm not used to
19.1f we use energy-saving bulbs, we
20. His joke made me
(you/ do) at this time yesterday?
(pump) into the atmosphere every day.
(walk) so far, so I must stop
(rest) for a while.
(save) a lot of money.
(laugh) a lot.
. Choose the words or phrases that are not correct in standard English.
21. Thereare a lot of changes in our city in the past ten years.