Choose the tense that correctly identifies the unlined verb.

1.An underwater archaeologist(studies) shipwrecks and artifacts from watery graves.

A:Present***
B:Present perfect
C:Past

2.Archaeologists (have found) underwater treasures such as jewels, precious metals, and even medical instruments.

A:Past perfect
B:Present perfect***
C:Past

Are these correct?

Both are right.

Thank you!

You're welcome.

Yes, your answers are correct.

In the first sentence, "studies" is the correct answer because it is in the present tense. The subject "underwater archaeologist" carries out the action in the present.

In the second sentence, "have found" is the correct answer because it is in the present perfect tense. The use of "have" indicates that the action of finding underwater treasures happened at some unspecified time before the present.