Read the passage: "Although vaccination campaigns have reduced measles worldwide, outbreaks still occur where coverage falls below the level needed for herd immunity." The tone of the passage is best described as

Read the passage: "Antibiotic resistance grows when antibiotics are prescribed for viral infections, which they cannot cure." It can be inferred that

Read the passage: "Antibiotic resistance grows when antibiotics are prescribed for viral infections, which they cannot cure. Each unnecessary course kills sensitive bacteria and leaves resistant ones to multiply." The main idea is that

But in the main, I feel like a brown bag of miscellany propped against a wall. Against a wall in company with other bags, white, red, and yellow. Pour out the contents, and there is discovered a jumble of small things: priceless lengths of string, a key to a door long since crumbled away, a rusty knife-blade, old shoes saved for a road that never was and never will be a nail bent under the weight of things too heavy for any nail, a dried flower or two still a little fragrant. In your hand is the brown bag. On the ground before you is the jumble it held-so much like the jumble in the bags, could they be emptied, that all might be dumped in a single heap and the bags refilled without altering the content of any greatly. A bit of colored glass more or less would not matter. Perhaps that is how the Great Stuffer of Bags filled them in the first place-who knows?The primary purpose of the passage is to:

It seemed to me, as I kept remembering all this, that those times and those summers had been infinitely precious and worth saving. There had been jollity and peace and goodness. The arriving at the beginning of August) had been so big a business in itself; at the railway station the farm wagon drawn up, the first smell of the pine-laden air, the first glimpse of the smiling farmer, and the great importance of the trunks and your father's enormous authority in such matters, and the feel of the wagon under you for the long ten- mile haul, and at the top of the last long catching the first view of the lake after eleven months not seeing this cherished body of water. The shouts and cries of the other campers when they saw you, and the trunks to be unpacked, to give up their rich burden. (Arriving was less exciting nowadays when you sneaked up in your car and parked it under a tree near the damp and took out the bags and in five minutes it was all over, no fuss, no loud wonderful fuss about trunks.)In the passage, the author emphasizes which aspect of the childhood memory?

I fretted the other night at the hotel at the stranger who broke into my chamber after midnight, claiming to share it. But after his lamp had smoked the chamber full and I had turned round to the wall in despair, the man blew out his lamp, knelt down at his bedside, and made in low whisper a long earnest prayer. Then was the relation entirely changed between us. I fretted no more, but respected and liked him. The probable purpose of the author using the phrase, "lamp had smoked the chamber full" is to:

I fretted the other night at the hotel at the stranger who broke into my chamber after midnight, claiming to share it. But after his lamp had smoked the chamber full and I had turned round to the wall in despair, the man blew out his lamp, knelt down at his bedside, and made in low whisper a long earnest prayer. Then was the relation entirely changed between us. I fretted no more, but respected and liked him. What can the reader infer about the speaker based on the passage?