Shanghai and Nanjing are among the most importantcities in China _____ their size and population.

____ to sunlight for too much time will do harm to one’s skin. [ ]

I should not have laughed if I ______ you were serious.

Jenny found in music _______ peacewhich was missing in _______ world full of challenges.

Would you like to go to Mike’s birthday party with us–I will go to his party if I .