Match the new words with their corresponding explanations.
Choose the best answer to complete each sentence.(选择最佳答案完成句子。)The children ran away from the orchard(果园) ______ they saw the guard.
A. the moment
B. for
C. before
D. as
It seemed only seconds ________ the boy finished washing his face.
A. when
B. before
C. after
D. even if
Speak to him slowly _____ he may understand you better.
A. since
B. so that
C. for
D. because