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Exercise 4

1.       He tried to avoid_______ my question.

          a. answer                     b. answering              c. to answer                 d. to have answered

2.       Paula has given up _______ to lose weight.

          a. try                            b. trying                     c. to try                        d. to have tried

3.       We can't go on_______ like this.

          a. living                       b. live                        c. to live                      d. to be living

4.       Don't keep_______ me while I'm talking.

          a. interrupt                   b. to interrupt            c. interrupting              d. to have interrupted

5.       I can't imagine Bill _______ a motorbike.

          a. ride                          b. riding                     c. to ride                      d. to be riding