____ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
It is in Qingdao ___ you’re going to pay a visit to ____ this kind of washing machine is produced.
Luckily, the poor boy had enough money _____ he could buy a train ticket.
________, it began to rain unexpectedly.
Several rounds of air and ground attacks from the allied force left the whole city _______.
It is the third time that he ____ abroad on business this year.