问题
完形填空
The boy was about to dive into the river ________ he found a catfish swimming in the river.
答案
when
考查固定结构。be about to do...when...意为“正要干某事就在这时……”。
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The boy was about to dive into the river ________ he found a catfish swimming in the river.
when
考查固定结构。be about to do...when...意为“正要干某事就在这时……”。