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

AI-based robots can do household chores _____ they were humans.
1. as if
2. although
3. because
4. than
What would you do _____ you suddenly became famous and received a lot of publicity?
1. if
2. like
3. so that
4. such that
To prepare for the graduation party, we had a technician _____ big screens on the walls.
1. installed
2. install
3. installing
4. installs
I'm writing a report on wildlife conservation and need to get all facts _____.
1. check
2. checking
3. to check
4. checked