We started the attack when the enemy (cross) ______ the river.
举一反三
- There is no other way ( ) we can cross the river.
- The enemy troops were driven back when they ________ to cross the border.
- The enemy troops were driven back when they ________to cross the border. A: tried B: attempted
- There is no other way ____ we can cross the river. A: for B: whereas C: thus D: whereby
- We____be careful when we cross the street.