the Europeans knew what compass was, the Chinese had put it into practical use.
A: Before long
B: Long since
C: Long ago
D: Long before
A: Before long
B: Long since
C: Long ago
D: Long before
举一反三
- I knew Mr. Green _____________I knew Mrs. Green. A: long before B: efore long C: long ago D: after long
- It won' t be ______ he comes back. A: long before B: before long C: long after D: long since
- Mother told me that she would come back____________, maybe in a few weeks. A: long ago B: long before C: ater on D: before long
- A biology teacher made several tests with different animals tn find out which animal was the cleverest ______. A: before long B: long before C: not long ago
- That had happened__. A: efore long B: long before C: very soon