---I phoned you at 7 yesterday evening but nobody answered.
---Oh, I ______ my dog in the park then.
| A．walked | B．was walking | C．had walked | D．would walk |
____ him so far, she felt a little worried.
| A．Having not hear from | B．Not having heard from |
| C．Not hearing from | D．Have not heard from |
While other scientists are keeping__ __eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in __ __humans.
| A．a , / | B．an, / | C．the, an | D．an, the |
My sister ,as well as her classmates who _____late for class,
_____criticized by Mr. Hunt.
| A．were ;was | B．was; were | C．was; was | D．were; were |
After five hours’ drive, they reached _____they thought was the place they had been dreaming of.
| A．where | B．what | C．whichever | D．whatever |
The human body consists of organs, each ____a definite job to do.
| A．have | B．to have | C．has | D．having |