I used to get up early the morning.

Shall I open the window to let some fresh air in —No，________ .

____all kinds of difficulties，the workers have made rapid progress in the construction of the World Expo 2010 Shanghai

“Could you help me solve the math problem？”“Of course, I can.” He replied ________.[ ]

Do you think Allan came by taxi?– No. If he had, I don’t believe he ______ his bike here.