II. Grammar and Vocabulary
Section A
Directions: After reading the passage below, till in the blanks to make the passages coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best tits each blank.
We all know that cleaning our teeth is important, right? Because, if you don’t clean them and things go wrong, they can cause you a lot of pain and discomfort. We ____1____ (teach) from a young age how to clean our teeth, but the question is— do we all clean our teeth in the same way? Is there a specific rime, technique, or duration you ____2____ include into your dental routine?
When our milk teeth first appear in our infant years, we are shown, often by our parents, how to clean them—____3____ ritual normally accompanied by some kind of pleasing song. ____4____ we mature, our baby teeth drop out, replaced by adult teeth. And soon it’s ____5____ trips to the dentists that we get more advice. And that’s the issue—— when trying to discover the best way to brush your teeth, it tee Is like there are so many different tips and tricks.
University College London (UCL) analyzed 66 sources of tooth-brushing advice from around the world. The most commonly ____6____ (recommend) techniques incorporated circular movements and horizontal brush strokes. However, there were some deviations. The angle of the brush, use of vertical movements and rigorous scrubbing were all variations on brushing advice.
And it seems that no one single technique is the standard method— so, if that’s the case, how do we know ____7____ we’re doing it right? Well— there is some standard advice. It seems that brushing for between two to three minutes, two or three times a day, is the best course of action. And if you’re one of these people ____8____ think it’s wise to brush straight after sugary foods to prevent decay, think again. Apparently, bacteria weaken the engine (牙釉质) almost immediately upon eating, so it’s ____9____ (wise) to wait for an hour or so before brushing.
So, while there is not one standardized technique, most dentists recommend a combination of horizontal and circular movements, _____10_____ (last) for between two to three minutes, two or three times a day. Do that, and you might not need too many trips to the dentist.
【答案】1. are taught##have been taught
2. should##must
3. a 4. As## When
5. from 6. recommended
7. if##whether
8. who## that
9. wiser 10. lasting
