Circle the correct answer

4 Circle the correct answer.
With the MX3007 digital camera you
(17) can't/will/might go wrong! You
(18) can/are able/would look at each
photo after you've taken it. If you don't like it,
just delete it. Taking the perfect photo is easy!
And with a credit card you (19) can /couldn't/
shall buy online today. The MX3007 (20) is
allowed to /could/must be yours at the click
of a mouse. Don't wait, click NOW!