[ Vocabulary and Tenses ]
they … for an hour before the doctor came
A. had been waiting
B. waited
Select your answer:
Random Topics:
Past Continuous TenseLets vs. Let’s Farther vs. Further Definite and Indefinite ArticlesTypes of PhrasesContinuous TensesModals, Phrasal Verbs, Gerunds and InfinitivesPresent Perfect: for/sinceConditional Sentence
Other quiz:
Grammar › ViewThe leaves of the white mulberry provide food for silkworms, ______ silk fabrics are woven.
A. from whose cocoons
B. from cocoons
C. whose cocoons are from
D. whose cocoons
Grammar › View
an -ing verb used as a verb must have a ______
A. Gerund
B. Participle
C. Helping Verb
D. Noun
How to use : Read the question carefully, then select one of the answers button.