We finished the run in less than half the time __________.
They lost their way in the forest, and . Which of the following is wrong?
The latest edition of Harry Porter has been a best-seller for 3 weeks_______.
If they _______ what I was saying, they'd know what I was talking about.
He ______ the math problem, his classmates wanted to help him out.
The little girl ________ to be a good singer if she gets good training in a music school.