13. COMPLEX SENTENCE Complex sentences are often formed by putting these words at the beginning of the dependent clause: as, as if, before, after, because, though, though, even though, while, when, whenever, if, during, as soon as, as long as, since, until, unless, where, and wherever. These words are called subordinating conjunctions .
14. 1. When he handed in his homework , he forgot to give the teacher the last page. 2. The teacher returned the homework after she noticed the error. 3. The students are studying because they have a test tomorrow.
15. When a complex sentence begins with a subordinator such as sentences 1, a comma is required at the end of the dependent clause. When the independent clause begins the sentence with subordinators in the middle as in sentences 2, 3 no comma is required. If a comma is placed before the subordinators in sentences it is wrong.
16.
17. 1. When he ______ (hand or handed) in his homework , he forgot to give the teacher the last page. handed
18. FOOD-WISE The standard of food, food hygiene and storage in our shops today is higher than it has been. Yet food poisoning is on the increase. Although there is no certain way of knowing if food is dangerous to our health, there are step everyone can take to minimize the risk of illness from harmful bacteria in home-prepared food.
19. Reading the labels The trend towards freshness in our food shop, with less reliance on preservatives, means modern methods of packaging and refrigeration have an important part to play in keeping food fresh and nutritious. The date codes shown on product form an essential part of the company's quality check. They help store staff, and you, to know when food is at its best and safest.
20. Checking the dates carefully when you buy, and eating the food by the date shown (or throwing it away), are important step in safeguarding your health. DISPLAY UNTIL dates indicate when unsold products must be removed from display by the supermarket (e.g. Cookies, biscuits). USE BY dates appear on highly perishable, chilled products which have the shortest shelf-life (e.g. Fresh meat or milk).
21. USE BY END date (month and year) appear on frozen foods. BEST BEFORE dates appear on food with a short to medium-term shelf-life such as bread and cake. BEST BEFORE END date ( month and year) appear on items with a longer shelf-life such as tinned food.
22. It is impractical or unnecessary for some foods to carry date codes. Watchful staff checks the quality of loose fruit and vegetables, for example, and some item like wines and spirits will remain in good condition for longer than you are likely to want to keep them!
