Choose the most appropriate option to fill in the blank:
The new washing machine will not start ______ you shut its lid firmly.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → unless
Complete sentence: The new washing machine will not start unless you shut its lid firmly. The machine will not start if the lid is not shut.
| Option | Meaning and use | Example |
|---|---|---|
| (1) if | gives a condition without the “not” idea | If you finish early, you can go out to play. |
| (2) although | shows that something happens in spite of another fact | Although the bus was late, we reached on time. |
| (3) so that | shows a purpose | She saved money so that she could buy a phone. |
| (4) unless (answer) | means if not. It gives the one condition that must be met | The guard will not open the gate unless you show your ID card. |