Answer:

1. can using when you were five years old?

A. can

B. can't

C. could

D. couldn't

2. A fish can't live without water .

A. can

B. can't

C. could

D. couldn't

3.Dan can skate very well. he should practice a lot

a. can

b. can't

c. could

d. couldn't

4. the man has the right tools.He can start working now.

a. can

b. can't

c. could

d. couldn't

5.Tom can't go to school because he has an allergic reaction.

a. can

b. can't

c. could

d. couldn't

(not sure of the number one because I think the sentence was cut.)