3 . 判断以下句子的主干属于哪一种结构

A.(S.+V.)     B.(S.+V.+O.)     C.(S.+V.+O.+O.C.)     D.(S.+V.+IO.+DO.)     E.(S.+V.+P.)

1. Tales from Animal Hospital will delight all fans of the programme and anyone who has a lively interest in their pet, whether it be a cat, dog or snake!
2. Although happiness is a door that is always open, we are the ones who have to decide if we are going to walk through the door.
3. Many people consider possible what is really impossible if effort is made.
4. As a person who writes about food and drink for a living, I couldn’t tell you the first thing about Bill Perry or whether the beers he sells are that great.
5. This trend began during the Second World War, when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail.
6. It is difficult to measure the quantity of paper used as a result of use of Internet-connected computers, although just about anyone who works in an office can tell you that when e-mail is introduced, the printers start working overtime.
7. The number of the bees is going down every year largely because of human activity, though a third of the world’s food production depends on this yellow and dark insect and other pollinators.
8. The Conservatives’ planning reform explicitly gives rural development priority over conservation, even authorizing “off-plan” building where local people might object.
9. The very small amount of oxygen, nitrogen and water vapor in the atmosphere of Mars makes it unlikely that the planet could support the kind of living things that we know on the earth.
10. Having chosen family television programs and women’s magazines, the toothpaste marketer, for instance, must select the exact television programs and stations as well as the specific women’s magazines to be used.