---- May I smoke here?
--- If you , choose a seat in the smoking section.
A．should B．could C．must D．may
There are lots of problems in your hometown, but we're happy to see many of them________.
A．are solving B．are solved C．have solved D．are being solved
Everyone is different and that is ________ makes our world so much better.
A．that B．which C．what D．who
The rich shouldn't________their wealth. Instead, they should contribute more money to the poor.
A．show off B．take off C．put off D．give off
Try to be independent, for your parents can't do__________for you all your life.
A．something B．nothing C．everything D．anything
Jamaican Usain Bolt was reported ______the world record of 100m in 9.69 seconds, thus winning his first gold medal.
A．breaking B．having broken C．to be broken D．to have broken
