Question

        twice a year, whether it is a car ,a bus or a truck, is the rule that every driver must obey in this city.

A．Examining	B．Examined
C．Being examined	D．Having been examined

Answer 1

C

試題分析：考查動名詞用法。本句中being examined twice a year是動名詞短語在句中做主語。動名詞做主語表示經(jīng)常性，習(xí)慣性的動作。句意：無論是轎車，公交車還是卡車，兩年被檢查一次是每個司機都必須遵守的規(guī)定。故C正確。
點評：動名詞做主語表示經(jīng)常性習(xí)慣性的行為，注意其與不定式做主語的差別。不定式做主語表示具體的一次性的行為。