I think you’d better concentrate ____________ your work if you want to finish on time.
A. at
B. on
C. of
D. for

Random Topics:
Active & Passive VoiceVerbs & AdverbsAlthough, Though, In spite of, DespiteVerbs and AdverbsVocabulary and PrepositionsGerund and InfinitiveAdjective or AdverbKinds of NounsGrammar & ReadingModals and Past ModalsOther quiz:
Grammar › ViewEvaluate the sentences and choose the one that correctly uses commas in a series including introductory elements.
A. Before the meeting, please prepare your report, check the figures, and review the agenda.
B. Before the meeting please prepare your report, check the figures and review the agenda.
C. Before the meeting, please prepare your report check the figures, and review the agenda.
D. Before the meeting please prepare your report check the figures and review the agenda.
Vocabulary & Grammar › View
The spider’s bite was so ___________, that is caused Matilda to faint.
A. poisonous
B. luxurious
C. coastal
D. enjoyable
Tenses › ViewWhich sentence is not past perfect continuous tense ?
A. He had been waiting since daybreak.
B. If she had gone there yesterday, she would have seen you.
C. It had been raining all night.
D. My father had been working hard all day.
Present Simple › View
Mike and Joe __________ at school now.
A. is
B. they
C. are
