Scientists want to postpone the day when______.
A: all insects will be eliminated
B: all insecticides will be abandoned
C: super-bugs resistant to all poisons come out
D: scientists must invent new insecticides
A: all insects will be eliminated
B: all insecticides will be abandoned
C: super-bugs resistant to all poisons come out
D: scientists must invent new insecticides
举一反三
- We all look forward to the day when the scientists can _________ more secrets of the universe. A: A) treat B: B) discover C: C) support D: D) trap
- The day will surely come when all the people in the world enjoy peace.( )
- The day will surely come ____ all the people in the world enjoy peace. A: when B: how C: then D: why
- Summary writing is necessary for professionals such as _________. A: scientists B: businessmen C: lawyers D: all of the above.
- _______ the beginning of the 19th century did scientists know that all matter is made up of atoms.