——Would you rather go there by train or by air?—— _____.
____ his homework, the boy went out to play games with his friends.
Guilin is famous ____ its beautiful hills and rivers, while Kunming is famous ____ the Spring City.
Reading English loudly in the morning is good ____ your English study.
He has spent ____ money on his new house.
____ my opinion, we should start out at once.