Theboywasswimmingintheriver_______hesawtheUFO.[ ]A.whenB.whileC.because -八年级英语

题目简介

Theboywasswimmingintheriver_______hesawtheUFO.[ ]A.whenB.whileC.because -八年级英语

题目详情

The boy was swimming in the river _______ he saw the UFO.    
[     ]
A. when          
B. while                
C. because
题型:单选题难度:中档来源:月考题

答案

A

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