Hearing specialists are also called______________.

You borrow a book from the library by using your library card. This is called______________.

The nutrient cycles between the living and nonliving parts of an ecosystem are called______________.（ ） A: physical cycles B: chemical cycles C: Biogeochemical Cycles D: biological cycle

Who ______ the workers to take up the struggle A: called for B: called on C: called in D: called off

John<br/>_______ the office as he was passing, but Mary was out. A: called for B: called up C: called on D: called at

Because the chairman of the board was absent, the meeting had to be ______. A: called out B: called on C: called off D: called up

The meeting had to be ____ because of the absence of chairman of the board. A: called out B: called off C: called on D: called up

The plan had been ________, which made him very angry. A: called off B: called up C: called in D: called on

Listen! Someone ________ for help! A: called B: is calling C: has called D: had called

I ______ Mr. Green last week and had a long talk with him. A: called on B: called forth C: called after D: called off