Alex saw some________(mouse) running across the floor. 2. We have four ________(class) this morning. 3. Accurate ______(datum) covering the fact are not obtainable. 4. Thunder and lightning are __________of nature. (phenomenon) 5. There are 20_____________(woman doctor) in this hospital. 6. They are real ______(hero). 7. There are many _____________(Englishman) coming here every year. 8. There are lots of ________(fish) in the river. 9. Do you like _________(potato)? 10. Pandas like ________(bamboo).