[ Gerunds and Infinitives ]
I forget …………………. the door, but I’m sure I must’ve locked it.
A. locking
B. to lock

Random Topics:
Definite and Indefinite ArticlesToeic VerbPresent Perfect and Simple Past TenseIrregular Plural NounsPast or Present Verb TensePronouns, Verb, ConjunctionGrammar - QuantiflierRun-On SentencesTenses: Present simple, Past Simple, Future SimpleIdiom and TensesOther quiz:
Tenses and Structures › View. Which of the following is a correct collocation? (make a mistake, do a mistake)
A. do a fault
B. make an error
C. make a mistake
D. do a blunder
Grammar › View
________ I’m going to bed later, I’ve been waking up later.
A. Even if
B. Now that
C. In case
D. Whether or not
Phrasal Verb › ViewDon’t _____________! If you keep practising, you will be a great basketball player someday.
A. take up
B. show up
C. pick up
D. give up
Vocabulary & Grammar › View
. The integration of ____ technology into the new smartphone model has helped improve user experience.
A. advanced
B. real-time
C. effortless
D. self-driving
