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

The French maintain a ________ separation of personal and professional life.

In the Grammar-Translation Method, grammar analysis and translation proved to be _______ in studying foreign culture through literary works.

________, what could we do?

Our payment terms (付款方式)are ___ , irrevocable letter of credit for the full invoice value.( )

Bloomfield drew on ______ psychology when trying to define the meaning of linguistic forms.

The missing boys were last seen ________ near the river.

I ’ve got the order from the boss that the work _______ finished before 5 p.m. today.

________ in thought, he almost ran into the car in front of him.

James has just arrived, but I didn ’ t know he ________ until yesterday.