By the year 2010, scientists probably ______ an effective treatment for cancer.
A: will have discovered
B: are discovering
C: will be discovering
D: have discovered
A: will have discovered
B: are discovering
C: will be discovering
D: have discovered
A
举一反三
- The Vikings are believed ________America. A: to have discovered B: to discove C: in discovering D: to have been discovered
- Madame Curie is believed ____ the radium. A: discovering B: having<br/>discovered C: to have discovered D: to discovered
- The scientist ________ a new bacteria in 1912. A: discovered B: was discovering C: discovers D: have discovered
- Madam Curie is believed ___ the radium. A: having discovered B: to discover C: to have discovered D: discovering
- Madame Curie is believed _________ radium (镭). A: discovering B: having discovered C: to have discovered D: to discover
内容
- 0
Scientists have made a major _____________in the treatment of cancer.
- 1
The scientist ( )a new bacteria in 1912. A: discovered B: was discovering C: discovers
- 2
According to the passage, scientists have discovered that influenza viruses_____.
- 3
We’re looking forward to his new _______ . A: discover B: discovered C: discovery D: discovering
- 4
Scientists have made a major _____________in the treatment of cancer. A: eakdown B: eakthrough C: efficiency