MODAL SENTENCES

Choose the correct answer!

(FOR QUESTION NO 1-10)

1). Suzy had better ___ her study habits if she hopes to be admitted to a good university.

• A. to change

• B. change

• C. changing

• D. changes

2). A future system of solid waste management should ___ with reduction in the amount of

waste.

• A. begun

• B. begin

• C. began

• D. to begin

3). The theory of Continental Drift assumes that there ___ long term climatic changes in many areas during the past.

• A. must have been

• B. must have

• C. must be

• D. must

4). The general public ___ a large number of computers now, because prices are beginning to decrease.

• A. must buy

• B. must have bought

• C. must be buying

• D. must buying

5). A fish must constantly ___ water in order to keep a current flowing through its delicate gills.

• A. gulp

• B. gulping

• C. gulps

• D. to gulp

6). The prices of homes are so high in urban areas that most young people cannot ___ to buy them.

• A. to afford

• B. affords

• C. affording

• D. afford

7). To check for acidity, one had better ___ litmus paper.

• A. use

• B. to use

• C. to use

• D. useful

8). The great apes, a generally peaceful species, ___ in groups.

• A. would rather living

• B. would rather they live

• C. would rather live

• D. would rather lived

9). He told me a lot about the Philippines. He ___ there for a long time.

• A. must have lived

• B. ought to be lived

• C. might be living

• D. should be living

10). When we got home, we found the front door open. Somebody ___ entered the house while we were away.

• A. must have

• B. would have

• C. ought to have

• D. should have