[ Grammar ]
Scientists ………. life on other planets yet.
A. didn’t discover
B. haven’t discovered
C. aren’t discovering
D. don’t discover
Select your answer:
Random Topics:
Good vs. Well Superlative Degree (Adjective) Passive Voice PassivisationModals "Should"Conditional Sentences Type 0, 1 and 2Was and WereCompound and Complex SentencesGerund/ To Verb/ Verb
Other quiz:
Modal Verbs › ViewWhat kind of work ____________ I do?
A. must
B. should
Present Perfect and Simple Past Tense › View
She ________ (not/phone) me yet.
A. hasn’t phoned
B. haven’t phoned
C. didn’t phone
D. doesn’t phone
How to use : Read the question carefully, then select one of the answers button.