--- I ______ so busily recently that I ______ no time to help you with your math. --- That’s OK. I can manage it by myself.
She made a promise _______ anyone could save her life, she would give him all her wealth.
With all the family members ______ on vacation without him, the boy felt extremely lonely and afraid.
Why so many youths are _____ on playing computer games often puzzles us a lot.
_______ you feel exhausted after the long tiring journey, you may as well take a good rest at home.
Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb(炸弹) was _____, three of whom were killed.