Choose the correct answer.

You have to work _______ if you want to succeed.

Choose the word that has the same meaning as the underlined word.

Scientific progress brings us many conveniences and advanced machines, such as computers, automobiles, and so on.

Choose the correct answer.

In Science, you should repeat your _______ several times to make sure that the first results weren’t just an accident.

Choose the correct answer.

I often eat sticky rice cake, but I don’t know _______ make it.

Choose the correct answer.

Simply speaking, _______ is the tools and machines that help to solve problems.

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Scientists are planning _______ Mars in the near future.

Choose the correct answer.

Robots save workers from _______ dangerous tasks.

Choose the correct answer.

- _______ do you play tennis?

- For exercise.