-Can you tell me ______Beijing?
-Twice.
how often you go to
how soon you'll go to
how long you have been in
how many times you have been to
—I will go to Qingdao for a visit with my family during the long holiday of May. —.
—Can you catch what 1 said? —Sorry, I can_________ understand it.
I think you have dropped_________ "r" in writing “merry”.
No one knows ________ in the future.
--There will be _____air pollution if there are_____ people driving. --I hope the air will be fresher soon.