There are several research centers in China ______ certain diseases are being studied.
举一反三
- There are several research centers in China a certain disease called bird flu is being studied.
- There are several research centers in China________a certain disease called Bird Flu is being studied. A: which B: where C: when D: what
- Certain diseases of the brain are suffered by human being _____.
- Some diseases are ________ by certain water animals.
- 5. The traditional silk centers in China are and provinces.