单选题 Our achievements to date should not, however, cloud our sober recognition ______ education provision in the country is far from balanced and adequate.

单选题 ______ he said just now didn't make any sense.

单选题 Scientists have obtained more evidence ______ plastic is finding its way into the human body.

单选题 The news ______ the Chinese football team had won the match excited all of us.

单选题 Without his support, we wouldn't be ______ we are now.

单选题 This is ______ my father has taught me — to always face difficulties and hope for the best.

单选题 The reason why I write this letter to you is ______ I have a problem in respect of the writing style.

单选题 The possibility ______ there is life on other planets in the universe has always inspired scientists to explore the outer space.

单选题 Our company culture is ______ makes us successful in creating a friendly environment.