[单项选择]A. Paper plates are cheaper than dishes. B. Dishes break more easily than paper plates.
C. There is no need to wash any dishes now. D. The woman’s roommate will return soon.

[单项选择]A Paper plates are cheaper than dishes. B Dishes break more easily than paper plates. C There is no need to wash any dishes now. D The woman’s roommate will return soon.

[单项选择]A. Paper plates are cheaper than dishes. B. Dishes break more easily than paper plates.
C. There is no need to wash any dishes now. D. The woman’s roommate will return soon.

[单项选择]Bicycles are cheaper to purchase and operate than cars, which have to be fueled and housed.
A. 购置和使用自行车比既要加油又要为其配备车库的汽车便宜得多。
B. 购买和使用自行车比汽车便宜，因为汽车需要油，还要车库。
C. 廉价的自行车比既要加油又要车库的汽车更需要购置和操作。
D. 自行车要比汽车购置和使用起来更廉价，这是一种不得不加油和供给车库的车。

[单项选择]
We are surrounded by so much paper and card that it is easy’ to forget just how complex it is. There are many varieties and grades of paper materials, and whilst it is fairly easy to spot the varieties, it is far more difficult to spot the grades.
It needs to be understood that most paper and card is manufactured for a specific purpose, so that whilst the corn-flake packet may look smart, it is clearly not something destined for the archives. It is made to look good, but only needs a limited life span. It is also much cheaper to manufacture than high grade card.
Paper can be made from an almost endless variety of cellulose-based material which will include many woods, cottons and grasses or which papyrus is an example and from where we get the word "paper". Many of these are very specialized, but the preponderance of paper making has been from soft wood and cotton or rags, with the bulk being
A. high grade card
B. middle grade card
C. low grade card
D. any grade card

[填空题](travel)（）by train is much cheaper than by air.

[填空题](travel) ______ by train is much cheaper than by air.

[单项选择]
Which kind of fruit is cheaper

[填空题]

Writing a Research Paper I . Research Paper and Ordinary Essay A) Similarity in (1)________e. g. —choosing a topic —asking questions —identifying the audience B) Difference mainly in terms of (2)________ 1. research paper: printed sources 2. ordinary essay: ideas in one’s (3)________ II. Types and Characteristics of Research Papers A) Number of basic types: two B) Characteristics: 1. survey-type paper: —to gather (4)________ —to quote —to (5)________ The writer should be (6)________ 2. argumentative (research) paper: A) The writer should do more, e. g. —to interpret —to question, etc. B) (7) varies with the topic, e.g.________ —to recommend an action, etc. III. How to Choose a Topic for a Research Paper In choosing a topic, it is important to (8 )________ Question No. 1: your familiarity with the topic Question No. 2: availability of relevant information on the chosen topic Question No. 3: narrowing the topic down to(9)_