They tried their best to resolve the residual problems.

单项选择题About twenty years ago, all important resources in our country were allocated by the central government.

单项选择题He left the building before smoke was spotted coming up the stairs.

单项选择题Two events have highlighted the tensions in recent years.

单项选择题His qualifications surpass the job requirements.

单项选择题You don't need to carry large amounts of cash; actually all financial business will be conducted by computers.