Whether or not there is life in outer space is an enigma. We may never know for sure until we are capable of space travel or aliens actually land on our planet. What would we call something to which we have no answer? Enigma means () .
A: reason
B: certainty
C: mystery
A: reason
B: certainty
C: mystery
举一反三
- 4.4 Lecture: Space LanguageWhat is personal space? Personal space is an ______ we regarded as our ______ and in which we feel ______ , relaxed, ______ and unthreatened. It ______ us and ______ us.
- We wish to advise you that we have duly booked the shipping space on S.S. “Yamatamaru”, ___ is scheduled to call on November 15. A: it B: which C: she D: the ship
- They opened a new store in our city, but not until last week _________. A: we visited B: we would visit C: did we visit D: have we visited
- We have in the past assumed that we have （1 ） not only of the land but of the sea… We have not. Life goes on there just as it did from the beginning. Man’s influence is as yet but a passing shadow. This discovery means that we may find other fishlike creatures, supposedly extinct but still living in the sea.
- Our dreams, they while we’re in them. It’s only when we that we realize something actually strange. May I ask you a question? You never really remember the beginning of your dreams, do you? You always right in the middle of what’s going on.