用适当的介词填空。
1. ___our great disappointment, he didn't attend such an important meeting.
2. The driver's carelessness led____the terrible car accident.
3.1 would stay at home instead____going out shopping.
4. The boy ran to his mother as soon as he caught sight____her.
5. They have speeded____production of the new computer.
6. The photos reminded me____the happy days we spent together during the summer holiday.
7. What____earth do you want to say?
8. He was hit for lack____fresh air.
9. Now he can communicate____foreigners in English freely.
10. He felt unsettled______the first few days in the new company..