China is a country __________ 56 different nationalities, among which Han ________ the majority of its population.
E-mail, as well as telephones, ________ an important part in daily communication.
Mark woke up one morning only to find both water and electricity _______ because he had not been able to pay the bills.
Cycling is highly _______ to people’s health and the environment.
Your performance in the driving test didn’t reach the required standard— ________, you failed.
I was lost in the strange city; ________, it began to rain heavily.