[ Grammar ]
Please be quiet. I ____ (try) to concentrate on my math homework.
A. am trying
B. are trying
C. try
D. tries

Random Topics:
Grammar: was/wereNarrative, Past TensesAdjective & AdverbConditional SentenceAdverb of TimeQuantifiers and ArticlesModals TensesFragment, Comma Splice and Run -on SentenceVerb PhraseNouns FormationOther quiz:
Simple Present Tense › ViewThis train (go) to the airport, but it (not stop) at Prince Edward.
A. goes, doesn’t stop
B. is go, is not stop
C. go, doesn’t stop
D. went, was not stop
TOEFL Adjective and Adverb › View
Quartz glass, also called fused silica, is used in manufacturing . . . temperature fluctuation.
A. minimize
B. to minimize that
C. to minimize
D. minimize to
Vocabulary › ViewWhat is ‘command’?
A. To give an order
B. The day before tomorrow
C. The highest part
D. He helped ______ the building.
Present or Past Tenses › View
What is the correct form of the verb ‘to go’ in past tense?
A. Gone
B. Going
C. Went
D. Goed
