________ the going gets tough, the tough gets going.
A. since
B. when
C. where
D. because

Random Topics:
Modal Verbs & Time PrepositionsPronunciation and VocabularyProgessive TensesTo Infinitive or Bare InfinitiveSimiles and Body IdiomsInfinitives for reasonsQuantifiers: too many, too much & enoughPoetry VocabularyGrammar (Possessive Pronouns)Auxiliary WordsOther quiz:
Tenses › ViewI … my bike for hours. That’s why I was sweaty and dirty when you saw me.
A. rode
B. was riding
C. had been riding
D. had ridden
Future Continuous Tense › View
There is a serious problem. I _ at around 4. pm to discuss it.
A. will call
B. will be calling
C. shall be call
D. should call
Grammar for TOEFL › ViewWe had to postpone the trip __ the weather conditions were too dangerous.
A. after checking the forecast, which showed storms and heavy rain for the week
B. because the forecast indicated severe storms that would make traveling unsafe
C. unless we could change our route to avoid the areas most affected by the storm
D. if the weather had been clear, we would have continued with our original plans
Present Tenses › View
My parents ____ (live) with me just now.
A. live
B. are living
C. have lived
D. have been living
