[单项选择]I don't know what his interests are, because we talked ______ about work when we met.
A. main
B. mainly
C. major
D. majorly

[单项选择]We______her letter last week. We don't know what has happened to her.
A. must receive
B. must have received
C. ought to receive
D. ought to have received

[单项选择]We don't know what the surface of Venus might ______ .
A. look as
B. look like
C. look over
D. look about

[单项选择]I will never know what was on his mind at the time, nor will ______.
A. anyone
B. anyone else
C. no one
D. no one else

[单项选择]

What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly that the whole "great chain of life" on this planet is in danger.
All of us live on a tiny spaceship carrying with it its own limited resources for survival.What we have now is all we will ever have to keep us alive.
But man has been harming this system. He cannot help it. Everything we do alters our environment: the ways we grow food and build shelter and create what we call "culture" and "civilization".
World population is growing at such a rate that by the year 2050 nearly seven billion people will live on the earth.Industrialization has added its own burden to the population pressure. The more we produce and consume, the more waste products we discharge into the air and water and land around us, where they do not disappear, but last forever in one form or another. Great progress i
A. great progress
B. agriculture
C. our soil
D. productivity

[单项选择]

What is intelligence We all know we have some, and some people seem to have more than others. There are various types of intelligence.
The most obvious categories that people fit into are those who are good with numbers and those who are good with words. Some of us are neither while others are both. A third category of intelligence is related to interpreting visual (视沉的)information. A common way of measuring intelligence is through the use of “IQ" or intelligence tests. These tests include many types of questions to measure different types of intelligence, but the three most important are numerical, verbal (文字的) and visual.
Most simple intelligence tests combine all three types of questions in equal numbers, so that everyone has the same chances, whether he or she is better at one type or another. The IQ is an average and says nothing about special abilities.
What factors affect the results of the IQ tests7 The number of the correct answ
A. IQ tests.
B. Intelligence.
C. How to improve your intelligence.
D. Why some people are more intelligent than others.