練習(xí)題：
    1. He might have been dead ____ the arrival of the doctors.
    A) but for B) except for C) with D) on
    2. These areas rely on agriculture almost ____, having few mineral resources and a minimum of industrial development.
    A) respectively B) undoubtedly C) incredibly D) exclusively
    參考答案：
    1. A
    要不是大夫趕來，他可能已經(jīng)死了。本題測試重點(diǎn)是虛擬語氣的使用。but for的意思是if not(要是沒有，要不是)，要求后面跟虛擬語氣的謂語。其他三個(gè)選項(xiàng)從意思上均說不通。
    2. D
    這些地區(qū)礦產(chǎn)資源貧乏，工業(yè)發(fā)展滯后，幾乎完全依賴農(nóng)業(yè)，本題測試副詞的用法。四個(gè)選項(xiàng)分別為respectively(分別地，各個(gè)地);undoubtedly(毋庸質(zhì)疑地，的確地);incredibly(難以置信地);exclusively(排外地，專有地)。根據(jù)句意只能選D。