NEGATIVE

因为太吵了，我们没法说话。

We ___couldn't talk because it was so noisy.

我小时候不会游泳。

I ___couldn't swim when I was a child.

他昨天不能来参加聚会，因为他感冒了。

He ___couldn't come to the party yesterday because he had a cold.

我昨天打不开门，因为钥匙不见了。

I ___couldn't open the door yesterday because the key was missing.

他在黑暗中什么都看不见。

He ___could ___not see anything in the dark.