The other timing system belongs in our internal clocks，which，left ________，would tie the body to a 25-hour rhythm.

_______ for the free ticket, I would not have gone to see film so often.

Younger children are curious ________ how things work ，and many of them want to take apart everything within their reach.

I asked him to ________ me a few minutes so that we could go over all the problems.

_______ is a fact that English is being accepted as an international language.

The old couple have been married for 40 years and never once _______ with each other.

Country life is better than city life ________ it offers fresh air and noiseless environment

He talked a lot about things and persons ________they remembered in the school.

I was writing a report last night; ________ I would not have stayed up late.

By "language acquisition is primarily the acquistion of the grammatical system of language", linguists mean that ______.