Question

Fill in gaps with can (could), may (might), be able to, have to, must:

1. Respiratory system _______ provide oxygen for metabolism in the tissues. 2. All waste materials ______ be carried away from all body tissues. 3. The veins of the stomach and intestines __________ perform a unique function. 4. The liver ___________ remove toxins, stores sugars, and processes the products of digestion
before they reach the other body tissues. 5. Circulatory system ________ provide cells with nutrients. 6. The term muscle ________ be derived from the Latin musculus meaning "little mouse". 7. Muscle action _____________ be classified as being either voluntary or involuntary. 8. The human skeleton ___________ be divided into the axial skeleton, and the appendicular skeleton. 9. There are usually 25 bones in the chest but sometimes there _________ be additional cervical ribs in humans.

Answer 1

Modal auxiliary verbs are can, could, may, might, shall, should, will, would, must and ought to.

They are used before other verbs to add meaning, like certainty or obligation, to these verbs.

Step-by-step explanation:

In this question, filling the gaps with can (could), may (might), be able to, have to, must:

1. Respiratory system is able to provides oxygen for metabolism in the tissues.
2. All waste materials have to be carried away from all body tissues.
3. The veins of the stomach and intestines are able to perform a unique function.
4. The liver must remove toxins, store sugars, and process the products of digestion before they reach the other body tissues.
5. Circulatory system must provide cells with nutrients.
6. The term muscle can be derived from the Latin musculus meaning 'little mouse'.
7. Muscle action can be classified as being either voluntary or involuntary.
8. The human skeleton can be divided into the axial skeleton and the appendicular skeleton.
9. There are usually 25 bones in the chest but sometimes there might be additional cervical ribs in humans.