Step 1 — Analyze the sentence:
The sentence is: Do not eat the cake. Wait __ your friends come.
Here, the blank requires a word that expresses waiting until a particular time or event happens.
Step 2 — Suitable connector:
The correct word is till. It is used as a conjunction meaning “up to the time when” or “until.”
Step 3 — Apply the word:
The complete sentence becomes:
Do not eat the cake. Wait till your friends come.
Step 4 — Conclude:
Thus, the correct word to fill the blank is till.
Answer: The correct answer is Till.