[ Tenses and Sentence Completion ]
I can’t understand ______ she is upset.
A. what
B. why
C. where
D. how

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Verb to Be Tenses & Object PronounWill or Going toFOR & SINCENarrative Tenses & ConditionalsTOEIC Grammar and Vocabulary ReviewModal Auxiliaries and Similar ExpressionsPrepositionGrammar SuffixesSimple Present vs Present ProgresivePresent Simple, Present Continuous or Present PerfectOther quiz:
Prepositions and Phrasal Verbs › ViewThere are a lot of beautiful shell …… that stretch of the beach.
A. across
B. along
C. under
D. in
Reporting Verbs › View
What about if we meet on Wednesday?
A. She suggested meeting on Wednesday.
B. She suggested to meet on Wednesday.
C. She suggested me to meet on Wednesday.
Articles › ViewDid you study ….. physics at school?
A. a
B. an
C. the
D. zero article
Gerund › View
She avoided ________ out tonight
A. telling
B. told
C. telt
D. tells
