Question

Tom was about to close the windows_____ his attention was caught by a bird.

A．when

B．if

C．and

D．till

Answer 1

A

解析试题分析：考查固定句型，句义：汤姆正要去关窗户，这是他的的注意力被一只鸟吸引了was /were about to do 。。。+when。。。。正要去做。。这是突然。。。，把握关键词was about to close，所以A正确。
考点：考查固定句型。