【正文】
s had 單元語法聚焦五 C 。 played C. called。 ( ) 蘇州 — Why are you so late today? — Three buses went by without stopping while I ________ at the bus stop. A. am waiting B. waited C. have waited D. was waiting B 單元語法聚焦五 D ( ) 如: While we were talking, the teacher came in. 當(dāng)我們正在交談時(shí),老師進(jìn)來了。 單元語法聚焦五 4. when和 while的區(qū)別: (1)引導(dǎo)時(shí)間狀語從句時(shí), while 連接的是時(shí)間段或與延續(xù)性動詞連用,而 when既可以連接時(shí)間點(diǎn),又可以連接時(shí)間段; when既可以與延續(xù)性動詞連用,又可以與短暫性動詞連用。樂山 — Did you watch the basketball match on TV last night? — I wanted to, but my father________ his favorite TV program. A. watched B. was watching C. wa