[ Verb-ing and Infinitive ]
They don’t know …………….. .
A. cook
B. how to cook
C. cooking
D. to cook

Random Topics:
-ed or -ingPresent and Future TensesPronunciation and VocabularyAntonymsDeterminersAdverbial ClauseShould and Shouldn'tVocabulary and GrammarPresent PerfectThe Future Simple TenseOther quiz:
Grammar › ViewAnna and I aren’t close friends, but she……… me a birthday card every year.
A. Is sending
B. Sent
C. Sends
Vocabulary › View
complete confusion and disorder
A. scurry
B. vanished
C. chaos
D. sternly
Lend vs. Borrow › ViewI have to go to my sister’s house to ________ her earrings for the party.
A. Borrow
B. Lend
Passive Voice › View
They landed on the moon.
A. Active Voice
B. Passive Voice
