1 . Listen! I can hear someone.............. at the door

• A. knock
• B. knocking
• C. to knock
• D. to be knocking

Answer: Option B

Explanation:

2 . I can hear someone _________

• A. to seream
• B. screams
• C. screaming
• D. or screaming

Answer: Option C

Explanation:

3 .  Choose the right option to fill in the blank: 'Listen! I can hear someone _____ at the door'.

• A. to be knocking
• B. knock
• C. to knock
• D. knocking

Answer: Option D

Explanation: