21. Until then, his family _D_ from him for six months.

A didnt hear B hasnt been hearing C hasnt heard D hadnt heard

until then 直到那時。 hear from sb. 收到某人的來信，得到某人的消息。

22. The conference _B_ a full week by the time it ends.

A must have lasted B will have lasted C would last D has lasted

見到介詞by引導的時間狀語，謂語動詞就應是完成時態。

24. Physics is _B_ to the science which was called natural philosophy in history.

A alike B equivalent C likely D uniform

be alike to sb. 對于某人來說均是一樣的。 be equivalent to 相當于。

All tastes are alike to him. 所有味道對他來說都一樣。

27. The new appointment of our president _A_ from the very beginning of next semester.

A takes effect B takes part C takes place D takes turns

semester n. 學期； president n. 大學校長； take effect 生效，發生效力；

take part in 參與，參加； take place=happen 發生； takes turn to do sth. 輪流做某事。

28. The president made a _A_ speech at the opening ceremony of the sports meeting, which encouraged the sportsmen greatly.

A vigorous B tedious C flat D harsh

ceremony n. 典禮，儀式；表達在某個典禮上介詞用at。 vigorous adj. 強勁有力的，強有力的。

harsh adj. 刺耳的，令人不愉快的； flat adj. 平淡無奇的； tedious adj. 冗長無聊的。

29. It is useful to be able to predict the extent _C_ which a price change will affect supply and demand.

A from B with C to D for

30. Finding a job in such a big company has always been _D_ his wildest dreams.

A under B over C above D beyond

beyond one s wildest dreams 做夢也想不到。

21. Until then, his family _D_ from him for six months.

A didnt hear B hasnt been hearing C hasnt heard D hadnt heard

until then 直到那時。 hear from sb. 收到某人的來信，得到某人的消息。

22. The conference _B_ a full week by the time it ends.

A must have lasted B will have lasted C would last D has lasted

見到介詞by引導的時間狀語，謂語動詞就應是完成時態。

24. Physics is _B_ to the science which was called natural philosophy in history.

A alike B equivalent C likely D uniform

be alike to sb. 對于某人來說均是一樣的。 be equivalent to 相當于。

All tastes are alike to him. 所有味道對他來說都一樣。

27. The new appointment of our president _A_ from the very beginning of next semester.

A takes effect B takes part C takes place D takes turns

semester n. 學期； president n. 大學校長； take effect 生效，發生效力；

take part in 參與，參加； take place=happen 發生； takes turn to do sth. 輪流做某事。

28. The president made a _A_ speech at the opening ceremony of the sports meeting, which encouraged the sportsmen greatly.

A vigorous B tedious C flat D harsh

ceremony n. 典禮，儀式；表達在某個典禮上介詞用at。 vigorous adj. 強勁有力的，強有力的。

harsh adj. 刺耳的，令人不愉快的； flat adj. 平淡無奇的； tedious adj. 冗長無聊的。

29. It is useful to be able to predict the extent _C_ which a price change will affect supply and demand.

A from B with C to D for

30. Finding a job in such a big company has always been _D_ his wildest dreams.

A under B over C above D beyond

beyond one s wildest dreams 做夢也想不到。