fety of gas, the government has checked the city’s gas supplysystem thoroughly.

well in the important exam , he came back home,andsmiling

How much did the old man _____ you for repairing your bike?—Five yuan. The price is very low.[ ]

My teacher often encourages me more friends.—-Your teacher’s idea is right .The more friends you make, you will be.

.So before I go any further I want to thank you very much for inviting me to __________ this important conference.