Q556
. . . . . . . . you work very hard, you cannot pass?
A.
Unless
AnswerB.
Until
C.
While
D.
As if
Answer: Option A
Solution
Answer: Option A
Solution:
We use the conjunction unless to mean 'except if'. The clause which follows unless is a subordinate clause (sc): it needs a main clause (mc) to make a complete sentence. When unless comes before the main clause, we use a comma.