[ Grammar ]
I was surprised by __________ understand the difficult concepts.
A. be able to
B. being able to
C. to be able to
D. been able to

Random Topics:
ExclamationPossessive NounsPresent and Past TenseIELTS GrammarConditional Sentence Type 3Gerund NounPoetryComperative and SuperlativeGrammar - Verb FormsGrammar - Present Perfect with already, just, yetOther quiz:
Vocabulary › ViewWhich word means “almighty, having unlimited power or authority”?
A. Palatable
B. Poignant
C. Omnipotent
D. Sophomoric
Grammar › View
I may ________ my grandmother at the hospital tonight.
A. visit
B. visits
C. visited
D. visiting
Present Perfect and Simple Past Tense › ViewI _____ (hurt) my finger. It is okay now.
A. has hurt
B. hurted
C. hurt
D. have hurt
E. have hurted
Grammar › View
The smart boy answered every question ____________.
A. honestly
B. truthfully
C. correctly
D. politely
