- This is an important problem _______ too few social scientists have researched.
- I don ’t mind _______ the decision as long as it is not too late.
- The conclusion from the study is not definite; it is just ________.
- It is not decided ________ the conference will be held.
- Johnson was ________ unknown before running for the presidency.
- Children have a natural ________ about the world around them.
- ―________ fine day it is today!
- The volunteers would rather go by train than ________.
- There is a growing body of evidence to support the fact that most people suffer from a lack of daydreaming _______ an excess of it.
- The engineer ______ my father works is about 50 years old.
置顶