A number of scuba divers __________ an underwater expedition. * ~plans ~was planning ~have planned June Walters, along with her friend, __________ baked some delicious cakes. * ~have ~has ~have been Both light and heat __________ causes of the sofa’s fading color. * ~was ~were ~is
Have planned: Since "Scuba divers" is a plural subject, Have planned is the only fitting option.
Have: Considering "June Walters and her friend" is a plural subject and the blank space is followed by a verb in simple past form (baked), the root verb have is fitting for both cases.
Were: Once again, "Light and heat" is a plural subject, hence the only fitting option is were.
