David wants to be ________ engineer while Cathy wants to be ________ doctor.
| A．an; the | B．the; the | C．the; a | D．an; a |
Bill was staying on a farm with his uncle last summer.So ____ Mary.
| A．did | B．has | C．was | D．is |
--How many eggs are still there in the fridge, Bill?
---_____.
| A．No one | B．No | C．Not | D．None |
About ____ of the teachers in our school ____ young people under thirty.
| A．two-five, are | B．second-fifth, is | C．two-fifths, are | D．two-fifth, is |
___Mr Chen is waiting outside to speak to you. He appears to be quite ___ important person.
| A．/. an | B．A, an | C．The, the | D．The, / |
Suan!Where have you been? You have no idea ___ worried I was.
| A．how | B．that | C．that how | D．what |