2019年高考英語難點37講--難點29 結構分析亦奏效
(46) a. and b. or c. then d. but
解析：第45題選a；第46題選b。兩題均為五星級題。
這兩題的答案應從句子結構分析入手，且兩句要同時分析，下文中是should引導的一般疑問句，為“should… or…?”“應該……還是……?”而這兩句是并列的兩個內容，所以45、46就可輕而易舉地獲得答案。
●錦囊妙計
句子結構分析是完形填空做題中的其中一個有效的辦法。句子結構分析應從句子入手，聯系上下文，對于定語從句的關系副詞和關系代詞、狀語從句的引導詞、虛擬語氣中的情態動詞、助詞及并列句中的表遞進、轉折關系的連詞，及復合句中的連詞及時態、語態往往是考慮的重點。
●殲滅難點訓練
1.()if there were no trees 1 vegetation of some sort to hold 2 the soil with roots, heavy rains would wash way the rich surface soil so necessary for agriculture. the result is that the land becomes 3 and unproductive…
(1) a. and b. or c. as well as d. either
(2) a. up b. firmly c. back d. high
(3) a. useful b. strong c. beautiful d. useless
2.()then the great day came 2 he was to march part the palace in the parade.
(2) a. where b. since c. when d. till
3.()since i happened to have read a book or two by the famous writer when tom invited me to go with him i 4 accepted.
(3) a. gladly b. sadly c. had d. was