Question

【題目】_______ his mother was cooking in the kitchen, the boy fell asleep in the chair.
A.Since
B.While
C.Because
D.Once

Answer 1

【答案】B
【解析】句意：當(dāng)他的媽媽在廚房做飯的時(shí)候，這個(gè)男孩在椅子上睡著了。A. Since自從； B. While 當(dāng)……時(shí)候；C. Because因?yàn)�；D. Once一旦。While引導(dǎo)的句子經(jīng)常用進(jìn)行時(shí)，表示在從句的動(dòng)作進(jìn)行的過程中，發(fā)生了主句的動(dòng)作。故選B。