Mark the letter A, B, C, or D to indicate the correct answer.

1. AI-based robots can do household chores _____ they were humans.

A. as if            B. although            C. because            D. than

2. What would you do _____ you suddenly became famous and received a lot of publicity?

A. if               B. like                     C. so that               D. such that

3. To prepare for the graduation party, we had a technician _____ big screens on the walls.

A. installed            B. install            C. installing            D. installs

4. I'm writing a report on wildlife conservation and need to get all facts _____.

A. check            B. checking            C. to check            D. checked