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

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Mixed General Quiz › ViewIf you want to make a phone call to Salt Lake City, you need to ___ that the area code is (801).
a. remember
b. remembered
c. remembering
d. remembers
Infinitives or Gerunds › View
I regret not …………………to my father`s advice.
A. to listen
B. listening
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
