It is extremely important for us to change our way of thinking or we will be out of step with our times.

Climate change is not a/an _______ problem to solve and it will take years. A: difficult B: critical C: easy D: important

Climate change was probably important in both ______ and evolution of dolphins. A: execution B: extinction C: exclusion D: excavation

An important innovation in this college was the introduction of the seminary method for advanced students. （） A: idea B: change C: matter D: policy

An important innovation in this college was the introduction of the seminary method for<br/>advanced students. A: idea B: change C: matter D: policy

It is a _____ change of view that fiber nowadays is considered to be an important part of a healthy diet. A: serious B: great C: significant D: vital

Complete the sentences with the given words, change the form if necessary. Regular ____________ (maintain) is very important if you want to keep this machine in good order.

Climate change was probably important in both ______ and evolution of dolphins. A: execution B: B. extinction C: C. exclusion D: D. excavation

At the end of the text, the author uses trees as an example to show that _____. A: a clean environment is very important to us B: everything in the world is precious C: change takes place very fast D: change takes place very slowly

The most important way of vocabulary development in present-day English is _______. A: borrowing B: semantic change C: creation of new words D: all the above