Topics: Modal Verbs of Certainty and Possibility
She must ______ all day because I haven’t seen her.
A. have worked
B. be working
Select your answer:

Random Topics:
Past Simple & Past ContinuousPreposition and ConjunctionZero & First ContidionalFuture or PastTenses and StructuresExclamationSo....that... Such.......thatArticles and DemonstrativesTime PhrasesInfinitives and GerundsOther quiz:
Vocabulary › Viewmeasurement of what is produced and what is required to produce it
A. free trade
B. productivity
C. culture
D. market economy
Future Forms › View
Hurry up! The shop ___________ in 15 minutes and we still haven’t bought all the food we need.
A. is closing
B. is going to close
C. closes
D. will close
