---What color_____ the cats?---I think ________white and black.
—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.