16. Our students are free to study _____ interests them.
A. that B. whichever C. whatever D. anything
答案： C
解析： 我們的學(xué)生有自由學(xué)習(xí)自已所感興趣的東西。
17. Mathematics _____ easy to learn.
A. is B. are C. can D. feels
答案：A
解析： 數(shù)學(xué)是很容易學(xué)習(xí)的。這里注意這個(gè)單詞Mathematics，是一門學(xué)科，謂語要用單數(shù)形式。
18. It’s never _____ .
A. late enough to learn B. not late enough to learn
C. too late to learn D. so late as not learn
答案： C
解析：活到老，學(xué)到老。too……to…… 太……而不能……, 這是一個(gè)否定句式，注意句子中有一個(gè)never，否定含義，雙重否定，所以這個(gè)句子為肯定的語氣。
19. I don’t know whether he is still _____ in collecting coins. He used to be, but that was several years ago.
A. interested B. interesting
C. interest D. disinterested
答案：A
解析： 我不知道他是否還對(duì)收集古幣感興趣。他過去是這樣的，但這是幾年前了。短語be interested in doing… 對(duì)…感興趣。
20. The noise outside was _____.
A. too irritating that
B. so irritating so his speech was hardly audible
C. so irritating that his speech was hardly audible
D. so irritating enough that his speech was hardly audible
答案：C
解析：外面的嘈雜聲是如此地令人厭煩，以至于很難聽清他的演講。 So…that… 如此…以至于… ； audible聽得見的； irritating 讓人氣憤的，讓人厭煩的。
