76.I doubt _______ they can complete the bridge ahead of time.

　　A. whether B. that C. why D. what

　　77.The question he asked was _______ I come here.

　　A. that B. how C. what D. because

　　78.Too many people are indifferent _______ others‘ troubles.

　　A. with B. to C. of D. about

　　79.Let us see how dictionaries are made and how the editors _______ definitions.

　　A. lead to B. arrive at C. reach for D. approach to

　　80.Shanghai is the place _______ I was born.

　　A. on which B. in which C. when D. that

　　參考答案：

　　76.正確答案：A答案解析：doubt 用在肯定句中，之后的賓語(yǔ)從句用 whether 或 if 引導(dǎo)。用在否定句中，后接賓語(yǔ)從句用 that 引導(dǎo)。

　　77.正確答案：B答案解析：這里表示的是：來(lái)的方式，要用how.

　　78.正確答案：B答案解析：indifferent，形容詞，“漠然的、冷淡的”，常用indifferent to.

　　79.正確答案：B答案解析：本題考查詞義辨析。arrive at：獲得(結(jié)果);達(dá)到(目的)。

　　80.正確答案：B答案解析：出生在某地，要用介詞in.此句話中，in which=where.