Johnson was ________ unknown before running for the presidency.

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

The conclusion from the study is not definite; it is just ________.

We refer to the limited range of sounds as the phonic medium of language and individual sounds within that range as ______.

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

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

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

It is not decided ________ the conference will be held.

Empirical studies show that the process of SLA is a process of constructing and modifying rules of communication.

Research findings have shown that language processing centers are situated in a single area of the left hemisphere.