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.訊息。
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.對於某人來說均是一樣的。
be equivalent to相當於。
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
【英語四級的詞彙筆記】
