[ Gerunds ]
There’s someone_______on the door. Come to see who he/she is.
A. knock
B. knocking
C. to knock
D. having knocked

Random Topics:
Hope, Thank, Modal VerbsPassive Voice & TensesPast Perfect SimpleLinking Verbs and TensesContinuous TensesApologizingProgressive Verb TensesCardiology ServicesPast ParticiplesModals in the PastOther quiz:
Preposition Form › ViewChoose the correct option to fill in the blanks with suitable prepositions.
The two brothers have not spoken for years since they had a fall ___________.
A. through
B. down
C. out
D. apart
Simple Present VS Present Continuous › View
_____ Merriam work in an office?
A. Is
B. Are
C. Do
D. Does
Grammar › ViewA fire……….destroyed a shop and closed part of a main shopping street in a south Wales town was started in outdoor waste bins.
A. which
B. what
C. where
D. in which
Idioms › View
“Against the clock” means ___.
a. a new record
b. a test of speed or time
c. an impossible task
