[ Grammar ]
While the astronauts __________ outside the space station, they saw a strange object.
A. work
B. worked
C. are working
D. were working
Random Topics:
How often - long - much - manyFOR & SINCEPresent Forms and Narrative TensesComparison Degree & Gerundsa, an, the, zero articleModals of ProbabilityLinking VerbsSimple and Past TensesGrammar: Used to, Would, Be used to, Get used toGerundsOther quiz:
Modal Verb › ViewMaría __________ walk in the park.
A. walk
B. park
C. can
Modal Verbs › View
I _________ clean my room before my friends come over.
A. have to
B. should not
Grammar › ViewWe’ll stay on the beach until … dark.
A. it gets
B. it might get
C. it will get
D. it is getting
Tenses › View
The jeans ____ perfectly after I got them tailored last weekend.
A. fit
B. fits
C. is fitting
D. will fit