Problem: Do "Tom" and "he" point to the same thing in the following sentence?

Tom threw his schoolbag down to Ray after *he* reached the bottom of the stairs.

OPTIONS:
- no
- yes
****
A: no

Problem: Do "Frank" and "he" point to the same thing in the following sentence?

Frank was upset with Tom because the toaster *he* had sold him didn't work.

OPTIONS:
- no
- yes
****
A: no

Problem: Do "his eyes" and "them" point to the same thing in the following sentence?

Fred covered his eyes with his hands , because the wind was blowing sand around. He lowered *them* when the wind stopped.

OPTIONS:
- no
- yes
****
A: no

Problem: Do "Archaeologists" and "They" point to the same thing in the following sentence?

Archaeologists have concluded that humans lived in Laputa 20,000 years ago. *They* hunted for evidence on the river banks.

OPTIONS:
- no
- yes
****
A:
yes