—I wonder why Mr. Green hasn't showed up at the meeting yet. —I'm not sure, but he __________ in a traffic jam driving here.
The boy failed four times, but he said he would try ___________.
Recently there have been many occasions____ you have attended events on your own.
My brother likes eating very much but he isn't very _____ about the food he eats.
Scientists are convinced the positive effect of laughter physical and mental health.
Prices of daily goods ________through a computer can be lower than store prices.