Mike didn’t notice Alice entering his room. He ____ a phone call.
| A．answered | B．has answered | C．was answering | D．is answering |
25．Mr. Duncan raised an unnecessary question__________-he then failed to find an answer.
| A．to which | B．for which | C．with which | D．by which |
24_______the sale usually takes place outside the house ，with the audience on benches ，_______chairs or boxes。
| A．having seated | B．to seat | C．seated | D．Seating |
23．We still remember once__________round the famous tower when we were young.
| A．having taken | B．to be taken | C．having been taken | D．to have taken |
22．— Marx looks nervous.
— So___________you if you had so fierce a competition.
| A．do | B．did | C．will | D．Would |
PART TWO LANGUAGE KNOWLEDGE
SECTION A
Directions: Beneath each of the following sentences there are four choices marked A, B, C, and D. Choose the one answer that best completes the sentence.
21. ________caused the accident is still a mystery.
A. How B. What C. That D. Where