Hello, listeners. Welcome to Henton Hospital Radio. Before our music program begins, I'm going to repeat some of our hospital rules.

    The hospital can sleep 800 patients. There are 8 beds in each ward（病房). The visiting hours are in the afternoon from 2: 30 to 3: 30 and in the evening from 7: 00 to 8: 00. But remember only two visitors at a time. Sorry about that, but you can see what would happen if we didn't have these rules.

    The other rules are about our time schedule. We start quite early-you might not be used to that. We wake you at 6 o'clock, and breakfast is at 8 o'clock, lunch at noon. There's tea at 3:30 and supper is at 6 o'clock.

    You can see the "No Smoking" sign-we don't allow smoking in the wards. I'm sure you understand why. However, if you do need to smoke, there are some smoking-rooms for you.

    You will find the radio switch(开关) on the wall near your bed, with your own headphones, if you want to listen. It's our own hospital radio wishing you a quick recovery(康复).

下图示意某小区域地形，若图中A河流定期改向可能的原因(    )

①全区全年高温，蒸发稳定

②全区降水有明显的季节变化

③A附近区域地形平坦

④植被覆盖良好，水土流失少

连词成句。

阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。

    On Thursday，Richard arrived at school with a big smile on his face．“Why are you so 1 ?”asked David．“Tonight my dad is going to bring home my new dog，”answered Richard．“What are you going to 2 it?”asked David．“I don't know yet，”answered Richard．

    All day long，Richard 3 about dog's names．During the math lesson，he thought about the name  “Zero”．During the English lesson．he thought about the names“Mary” and “Jim”．At the 4 of the day，he still did not know what to name his dog．So he was really 5 ．

    As soon as school was over，Richard ran 6 ．When he opened the door，a little ball came running toward Richard．Richard 7the little dog．He held the dog close to his 8 immediately，Richard sneezed(打喷嚏)，“Ah choo!”And again，he sneezed，“Ah choo!”His nose started to run．

    “Oh no!”said Richard's dad．“You must be allergic(过敏的)to the 9．He will have to stay at your uncle's house．”“Ugh!”said Richard 10 ，“I was going to name him Sneezy!”