- A baby might show fear of an unfamiliar adult, _______ he is likely to smile and reach out to another infant.
- ________ with the size of the whole earth, the highest mountains do not seem high at all.
- It is useful to science _______ the earth as an object in space.
- We must ______ that the experiment is controlled as rigidly as possible.
- Be careful, _______ you'll fall down.
- _______ the movie I would have finished my paper last Sunday.
- The boy ran out of the classroom without the teacher's _______.
- I'm sorry I forgot to write; I had so much else ________ my mind.
- I don't know how we can make ________ on the timetable for any more courses.
- ________ from the occasional late night party, our neighbors are very quiet.
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