Question

There are some health problems that，when ________ in time，can become bigger ones later on.                                                         (2013·浙江，19)

A．not treated	B．not being treated
C．not to be treated	D．not having been treated

Answer 1

A

句意為：有些健康問(wèn)題，如果不及時(shí)處理，以后會(huì)變得更嚴(yán)重。when not treated in time為插入語(yǔ)，在本句中為時(shí)間狀語(yǔ)從句，把that can become bigger ones later on這個(gè)定語(yǔ)從句給隔開(kāi)了。when引導(dǎo)時(shí)間狀語(yǔ)從句時(shí)，可以出現(xiàn)省略的現(xiàn)象，但必須滿足兩個(gè)條件：首先，時(shí)間狀語(yǔ)從句中的主語(yǔ)必須和主句主語(yǔ)一致；其次，從句中含有be動(dòng)詞。本句補(bǔ)充完整的狀語(yǔ)從句為：when they are not treated in time，其他選項(xiàng)形式不對(duì)。故答案為A項(xiàng)。