---What do you think made Mary so upset?--- ______ her new bike.
If your car isn’t insured, you may ________ losing everything when it hits something solid.
The traffic problems have severely affected economic development. ________, we must spare no efforts to solve them.
Compared with her sisiter, Jerry is even more _______ to, and more easily troubled by, emotional and relationship problems.
The real threat of fraud(欺诈) on the Internet has highlighted the fact ________ consumers fear shopping on line.
If you _________ the magazine, you will get an extra newspaper.