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