[ Verb Tenses and Modals ]
___ it is difficult to solve this mathematical problem, but I believe I can do it.
A. Since
B. Although
C. Now that
D. Hence

Random Topics:
Grammar (want to/ need to/ have to)Present Perfect: for/sinceModals of ObligationPast Tense & Past Continuous TenseAdverb of MannersPassive Voice, Question Tag, PrepositionsAdverb ClausesModals VerbModals - Reported Speech - Conditionalsso vs suchOther quiz:
Future Tenses › ViewHow do we form the future continuous?
A. will + verb
B. be going to + verb
C. verb + s
D. will + be + verb in -ing
Modal Verbs & Time Prepositions › View
Form a sentence incorporating a modal verb and a time preposition.
A. He should arrive by 7 AM.
B. You can meet me at 3 PM.
C. She can go after 5 PM.
D. I will leave before 9 PM.